142636520 has 32 divisors (see below), whose sum is σ = 345620520. Its totient is φ = 52665600.

The previous prime is 142636519. The next prime is 142636531. The reversal of 142636520 is 25636241.

It can be written as a sum of positive squares in 4 ways, for example, as 58767556 + 83868964 = 7666^2 + 9158^2 .

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 7 ways as a sum of consecutive naturals, for example, 136631 + ... + 137670.

Almost surely, 2^142636520 is an apocalyptic number.

142636520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142636520 is an abundant number, since it is smaller than the sum of its proper divisors (202984000).

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

142636520 is a wasteful number, since it uses less digits than its factorization.

142636520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274325 (or 274321 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 142636520 is about 11943.0532109675. The cubic root of 142636520 is about 522.4887110951.

The spelling of 142636520 in words is "one hundred forty-two million, six hundred thirty-six thousand, five hundred twenty".