12521995 has 4 divisors (see below), whose sum is σ = 15026400. Its totient is φ = 10017592.

The previous prime is 12521989. The next prime is 12522011. The reversal of 12521995 is 59912521.

12521995 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12521995 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12521995.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1252195 + ... + 1252204.

It is an arithmetic number, because the mean of its divisors is an integer number (3756600).

Almost surely, 2^12521995 is an apocalyptic number.

12521995 is a deficient number, since it is larger than the sum of its proper divisors (2504405).

12521995 is an equidigital number, since it uses as much as digits as its factorization.

12521995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2504404.

The product of its digits is 8100, while the sum is 34.

The square root of 12521995 is about 3538.6431015292. The cubic root of 12521995 is about 232.2154842468.

The spelling of 12521995 in words is "twelve million, five hundred twenty-one thousand, nine hundred ninety-five".