12704520 has 32 divisors (see below), whose sum is σ = 38113920. Its totient is φ = 3387840.

The previous prime is 12704507. The next prime is 12704537. The reversal of 12704520 is 2540721.

12704520 = T₃₄₆ + T₃₄₇ + ... + T₄₈₉.

It is a super-2 number, since 2×12704520² = 322809656860800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52816 + ... + 53055.

It is an arithmetic number, because the mean of its divisors is an integer number (1191060).

Almost surely, 2^12704520 is an apocalyptic number.

12704520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12704520 is an abundant number, since it is smaller than the sum of its proper divisors (25409400).

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

12704520 is a wasteful number, since it uses less digits than its factorization.

12704520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105885 (or 105881 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 12704520 is about 3564.3400511175. The cubic root of 12704520 is about 233.3383309587.

The spelling of 12704520 in words is "twelve million, seven hundred four thousand, five hundred twenty".