11972655 has 12 divisors (see below), whose sum is σ = 20752680. Its totient is φ = 6385392.

The previous prime is 11972651. The next prime is 11972677. The reversal of 11972655 is 55627911.

It is not a de Polignac number, because 11972655 - 2² = 11972651 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11972651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132985 + ... + 133074.

It is an arithmetic number, because the mean of its divisors is an integer number (1729390).

Almost surely, 2^11972655 is an apocalyptic number.

11972655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11972655 is a deficient number, since it is larger than the sum of its proper divisors (8780025).

11972655 is a wasteful number, since it uses less digits than its factorization.

11972655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266070 (or 266067 counting only the distinct ones).

The product of its digits is 18900, while the sum is 36.

The square root of 11972655 is about 3460.1524532887. The cubic root of 11972655 is about 228.7688150787.

The spelling of 11972655 in words is "eleven million, nine hundred seventy-two thousand, six hundred fifty-five".