12520621 has 8 divisors (see below), whose sum is σ = 13241088. Its totient is φ = 11820000.

The previous prime is 12520603. The next prime is 12520643. The reversal of 12520621 is 12602521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12520621 - 2¹¹ = 12518573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12520691) 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, 3655 + ... + 6196.

It is an arithmetic number, because the mean of its divisors is an integer number (1655136).

Almost surely, 2^12520621 is an apocalyptic number.

It is an amenable number.

12520621 is a deficient number, since it is larger than the sum of its proper divisors (720467).

12520621 is an equidigital number, since it uses as much as digits as its factorization.

12520621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9923.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 12520621 is about 3538.4489539910. The cubic root of 12520621 is about 232.2069905059.

The spelling of 12520621 in words is "twelve million, five hundred twenty thousand, six hundred twenty-one".