11951291 has 12 divisors (see below), whose sum is σ = 13447896. Its totient is φ = 10607520.

The previous prime is 11951287. The next prime is 11951299. The reversal of 11951291 is 19215911.

It is not a de Polignac number, because 11951291 - 2² = 11951287 is a prime.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (11951299) 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, 4055 + ... + 6351.

It is an arithmetic number, because the mean of its divisors is an integer number (1120658).

Almost surely, 2^11951291 is an apocalyptic number.

11951291 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11951291 is a deficient number, since it is larger than the sum of its proper divisors (1496605).

11951291 is a wasteful number, since it uses less digits than its factorization.

11951291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2362 (or 2351 counting only the distinct ones).

The product of its digits is 810, while the sum is 29.

The square root of 11951291 is about 3457.0639276704. The cubic root of 11951291 is about 228.6326624074.

The spelling of 11951291 in words is "eleven million, nine hundred fifty-one thousand, two hundred ninety-one".