142957240 has 32 divisors (see below), whose sum is σ = 332748000. Its totient is φ = 55210624.

The previous prime is 142957237. The next prime is 142957249. The reversal of 142957240 is 42759241.

It is a junction number, because it is equal to n+sod(n) for n = 142957196 and 142957205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142957249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60460 + ... + 62779.

It is an arithmetic number, because the mean of its divisors is an integer number (10398375).

Almost surely, 2^142957240 is an apocalyptic number.

142957240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142957240 is an abundant number, since it is smaller than the sum of its proper divisors (189790760).

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

142957240 is a wasteful number, since it uses less digits than its factorization.

142957240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123279 (or 123275 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 142957240 is about 11956.4727240102. The cubic root of 142957240 is about 522.8800254180.

The spelling of 142957240 in words is "one hundred forty-two million, nine hundred fifty-seven thousand, two hundred forty".