12521996 has 24 divisors (see below), whose sum is σ = 23432976. Its totient is φ = 5834240.

The previous prime is 12521989. The next prime is 12522011. The reversal of 12521996 is 69912521.

12521996 = T₁₀₃ + T₁₀₄ + ... + T₄₂₃.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6416 + ... + 8136.

It is an arithmetic number, because the mean of its divisors is an integer number (976374).

Almost surely, 2^12521996 is an apocalyptic number.

It is an amenable number.

12521996 is a deficient number, since it is larger than the sum of its proper divisors (10910980).

12521996 is a wasteful number, since it uses less digits than its factorization.

12521996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1849 (or 1847 counting only the distinct ones).

The product of its digits is 9720, while the sum is 35.

The square root of 12521996 is about 3538.6432428263. The cubic root of 12521996 is about 232.2154904284.

The spelling of 12521996 in words is "twelve million, five hundred twenty-one thousand, nine hundred ninety-six".