12590721 has 40 divisors (see below), whose sum is σ = 22116864. Its totient is φ = 7037280.

The previous prime is 12590719. The next prime is 12590723. The reversal of 12590721 is 12709521.

12590721 is a `hidden beast` number, since 1 + 2 + 590 + 72 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (12590719) and next prime (12590723).

It is not a de Polignac number, because 12590721 - 2¹ = 12590719 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12590723) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11040 + ... + 12126.

Almost surely, 2^12590721 is an apocalyptic number.

12590721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12590721 is a deficient number, since it is larger than the sum of its proper divisors (9526143).

12590721 is a wasteful number, since it uses less digits than its factorization.

12590721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123 (or 1114 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 12590721 is about 3548.3405980824. The cubic root of 12590721 is about 232.6395416235.

The spelling of 12590721 in words is "twelve million, five hundred ninety thousand, seven hundred twenty-one".