12601521 has 8 divisors (see below), whose sum is σ = 18668960. Its totient is φ = 8400996.

The previous prime is 12601489. The next prime is 12601543. The reversal of 12601521 is 12510621.

12601521 is a `hidden beast` number, since 12 + 601 + 52 + 1 = 666.

It is not a de Polignac number, because 12601521 - 2⁵ = 12601489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12601494 and 12601503.

It is not an unprimeable number, because it can be changed into a prime (12601621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233335 + ... + 233388.

It is an arithmetic number, because the mean of its divisors is an integer number (2333620).

Almost surely, 2^12601521 is an apocalyptic number.

It is an amenable number.

12601521 is a deficient number, since it is larger than the sum of its proper divisors (6067439).

12601521 is an equidigital number, since it uses as much as digits as its factorization.

12601521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466732 (or 466726 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 12601521 is about 3549.8621099981. The cubic root of 12601521 is about 232.7060400394.

The spelling of 12601521 in words is "twelve million, six hundred one thousand, five hundred twenty-one".