11951289 has 24 divisors (see below), whose sum is σ = 20891520. Its totient is φ = 6427008.

The previous prime is 11951287. The next prime is 11951299. The reversal of 11951289 is 98215911.

It is not a de Polignac number, because 11951289 - 2¹ = 11951287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11951287) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4509 + ... + 6650.

It is an arithmetic number, because the mean of its divisors is an integer number (870480).

Almost surely, 2^11951289 is an apocalyptic number.

It is an amenable number.

11951289 is a deficient number, since it is larger than the sum of its proper divisors (8940231).

11951289 is a wasteful number, since it uses less digits than its factorization.

11951289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11189 (or 11186 counting only the distinct ones).

The product of its digits is 6480, while the sum is 36.

The square root of 11951289 is about 3457.0636384076. The cubic root of 11951289 is about 228.6326496538.

The spelling of 11951289 in words is "eleven million, nine hundred fifty-one thousand, two hundred eighty-nine".