12505995 has 56 divisors (see below), whose sum is σ = 23294016. Its totient is φ = 6438528.

The previous prime is 12505981. The next prime is 12506003. The reversal of 12505995 is 59950521.

12505995 is a `hidden beast` number, since 12 + 50 + 599 + 5 = 666.

It is not a de Polignac number, because 12505995 - 2⁴ = 12505979 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 171279 + ... + 171351.

Almost surely, 2^12505995 is an apocalyptic number.

12505995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12505995 is a deficient number, since it is larger than the sum of its proper divisors (10788021).

12505995 is an frugal number, since it uses more digits than its factorization.

12505995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 20250, while the sum is 36.

The square root of 12505995 is about 3536.3816253340. The cubic root of 12505995 is about 232.1165375176.

The spelling of 12505995 in words is "twelve million, five hundred five thousand, nine hundred ninety-five".