136520004 has 48 divisors (see below), whose sum is σ = 324997568. Its totient is φ = 44592768.

The previous prime is 136520003. The next prime is 136520017. The reversal of 136520004 is 400025631.

It is a happy number.

It is a super-2 number, since 2×136520004² = 37275422984320032, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (136520003) 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, 222402 + ... + 223014.

Almost surely, 2^136520004 is an apocalyptic number.

It is an amenable number.

136520004 is an abundant number, since it is smaller than the sum of its proper divisors (188477564).

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

136520004 is a wasteful number, since it uses less digits than its factorization.

136520004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964 (or 962 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 136520004 is about 11684.1775063545. The cubic root of 136520004 is about 514.9109143044.

Adding to 136520004 its reverse (400025631), we get a palindrome (536545635).

The spelling of 136520004 in words is "one hundred thirty-six million, five hundred twenty thousand, four".