11957291 has 4 divisors (see below), whose sum is σ = 11970792. Its totient is φ = 11943792.

The previous prime is 11957279. The next prime is 11957299. The reversal of 11957291 is 19275911.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11957291 - 2¹⁰ = 11956267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11957299) 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 3 ways as a sum of consecutive naturals, for example, 5321 + ... + 7226.

It is an arithmetic number, because the mean of its divisors is an integer number (2992698).

Almost surely, 2^11957291 is an apocalyptic number.

11957291 is a deficient number, since it is larger than the sum of its proper divisors (13501).

11957291 is an equidigital number, since it uses as much as digits as its factorization.

11957291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13500.

The product of its digits is 5670, while the sum is 35.

The square root of 11957291 is about 3457.9316071895. The cubic root of 11957291 is about 228.6709167537.

The spelling of 11957291 in words is "eleven million, nine hundred fifty-seven thousand, two hundred ninety-one".