143042420 has 48 divisors (see below), whose sum is σ = 319107600. Its totient is φ = 53673984.

The previous prime is 143042411. The next prime is 143042429. The reversal of 143042420 is 24240341.

It is an interprime number because it is at equal distance from previous prime (143042411) and next prime (143042429).

It can be written as a sum of positive squares in 8 ways, for example, as 2951524 + 140090896 = 1718^2 + 11836^2 .

It is a super-2 number, since 2×143042420² = 40922267838912800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 143042392 and 143042401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143042429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152192 + ... + 153128.

It is an arithmetic number, because the mean of its divisors is an integer number (6648075).

Almost surely, 2^143042420 is an apocalyptic number.

143042420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 143042420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159553800).

143042420 is an abundant number, since it is smaller than the sum of its proper divisors (176065180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

143042420 is a wasteful number, since it uses less digits than its factorization.

143042420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1412 (or 1410 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 143042420 is about 11960.0342808873. The cubic root of 143042420 is about 522.9838561799.

Adding to 143042420 its reverse (24240341), we get a palindrome (167282761).

The spelling of 143042420 in words is "one hundred forty-three million, forty-two thousand, four hundred twenty".