11979261 has 12 divisors (see below), whose sum is σ = 19775392. Its totient is φ = 6845256.

The previous prime is 11979239. The next prime is 11979263. The reversal of 11979261 is 16297911.

It is not a de Polignac number, because 11979261 - 2¹⁰ = 11978237 is a prime.

It is a super-2 number, since 2×11979261² = 287005388212242, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11979263) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95011 + ... + 95136.

Almost surely, 2^11979261 is an apocalyptic number.

It is an amenable number.

11979261 is a deficient number, since it is larger than the sum of its proper divisors (7796131).

11979261 is a wasteful number, since it uses less digits than its factorization.

11979261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190160 (or 190157 counting only the distinct ones).

The product of its digits is 6804, while the sum is 36.

The square root of 11979261 is about 3461.1069038676. The cubic root of 11979261 is about 228.8108822986.

The spelling of 11979261 in words is "eleven million, nine hundred seventy-nine thousand, two hundred sixty-one".