11956491 has 40 divisors (see below), whose sum is σ = 19950480. Its totient is φ = 7091712.

The previous prime is 11956489. The next prime is 11956519. The reversal of 11956491 is 19465911.

11956491 is a `hidden beast` number, since 1 + 1 + 9 + 5 + 649 + 1 = 666.

11956491 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11956491 - 2¹ = 11956489 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11956691) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 25935 + ... + 26391.

It is an arithmetic number, because the mean of its divisors is an integer number (498762).

Almost surely, 2^11956491 is an apocalyptic number.

11956491 is a deficient number, since it is larger than the sum of its proper divisors (7993989).

11956491 is a wasteful number, since it uses less digits than its factorization.

11956491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505 (or 496 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 11956491 is about 3457.8159291668. The cubic root of 11956491 is about 228.6658169136.

The spelling of 11956491 in words is "eleven million, nine hundred fifty-six thousand, four hundred ninety-one".