142517920 has 24 divisors (see below), whose sum is σ = 336698964. Its totient is φ = 57007104.

The previous prime is 142517891. The next prime is 142517939. The reversal of 142517920 is 29715241.

It can be written as a sum of positive squares in 2 ways, for example, as 137264656 + 5253264 = 11716^2 + 2292^2 .

It is a super-2 number, since 2×142517920² = 40622715042252800, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 445209 + ... + 445528.

Almost surely, 2^142517920 is an apocalyptic number.

142517920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142517920 is an abundant number, since it is smaller than the sum of its proper divisors (194181044).

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

142517920 is an equidigital number, since it uses as much as digits as its factorization.

142517920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890752 (or 890744 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 142517920 is about 11938.0869489211. The cubic root of 142517920 is about 522.3438572527.

The spelling of 142517920 in words is "one hundred forty-two million, five hundred seventeen thousand, nine hundred twenty".