142420520 has 64 divisors (see below), whose sum is σ = 351786240. Its totient is φ = 51462400.

The previous prime is 142420517. The next prime is 142420529. The reversal of 142420520 is 25024241.

It is a happy number.

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 = 142420492 and 142420501.

It is not an unprimeable number, because it can be changed into a prime (142420529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75185 + ... + 77055.

It is an arithmetic number, because the mean of its divisors is an integer number (5496660).

Almost surely, 2^142420520 is an apocalyptic number.

142420520 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 142420520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175893120).

142420520 is an abundant number, since it is smaller than the sum of its proper divisors (209365720).

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

142420520 is a wasteful number, since it uses less digits than its factorization.

142420520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2066 (or 2062 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 142420520 is about 11934.0068711225. The cubic root of 142420520 is about 522.2248362292.

Adding to 142420520 its reverse (25024241), we get a palindrome (167444761).

The spelling of 142420520 in words is "one hundred forty-two million, four hundred twenty thousand, five hundred twenty".