11972165 has 16 divisors (see below), whose sum is σ = 15467760. Its totient is φ = 8862720.

The previous prime is 11972161. The next prime is 11972171. The reversal of 11972165 is 56127911.

It can be written as a sum of positive squares in 8 ways, for example, as 21316 + 11950849 = 146^2 + 3457^2 .

It is not a de Polignac number, because 11972165 - 2² = 11972161 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11972161) 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 15 ways as a sum of consecutive naturals, for example, 4031 + ... + 6339.

It is an arithmetic number, because the mean of its divisors is an integer number (966735).

Almost surely, 2^11972165 is an apocalyptic number.

It is an amenable number.

11972165 is a deficient number, since it is larger than the sum of its proper divisors (3495595).

11972165 is a wasteful number, since it uses less digits than its factorization.

11972165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2392.

The product of its digits is 3780, while the sum is 32.

The square root of 11972165 is about 3460.0816464355. The cubic root of 11972165 is about 228.7656941266.

The spelling of 11972165 in words is "eleven million, nine hundred seventy-two thousand, one hundred sixty-five".