1143420 has 96 divisors (see below), whose sum is σ = 3628800. Its totient is φ = 267264.

The previous prime is 1143407. The next prime is 1143433. The reversal of 1143420 is 243411.

It is an interprime number because it is at equal distance from previous prime (1143407) and next prime (1143433).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1143420.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19351 + ... + 19409.

It is an arithmetic number, because the mean of its divisors is an integer number (37800).

2^1143420 is an apocalyptic number.

1143420 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 1143420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1814400).

1143420 is an abundant number, since it is smaller than the sum of its proper divisors (2485380).

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

1143420 is a wasteful number, since it uses less digits than its factorization.

1143420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107 (or 105 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1143420 is about 1069.3081875680. The cubic root of 1143420 is about 104.5687527843.

Adding to 1143420 its reverse (243411), we get a palindrome (1386831).

Subtracting from 1143420 its reverse (243411), we obtain a palindrome (900009).

The spelling of 1143420 in words is "one million, one hundred forty-three thousand, four hundred twenty".