11191251 has 8 divisors (see below), whose sum is σ = 14938560. Its totient is φ = 7452392.

The previous prime is 11191249. The next prime is 11191261. The reversal of 11191251 is 15219111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11191251 - 2¹ = 11191249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11191231) 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 7 ways as a sum of consecutive naturals, for example, 2296 + ... + 5258.

It is an arithmetic number, because the mean of its divisors is an integer number (1867320).

Almost surely, 2^11191251 is an apocalyptic number.

11191251 is a deficient number, since it is larger than the sum of its proper divisors (3747309).

11191251 is a wasteful number, since it uses less digits than its factorization.

11191251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4225.

The product of its digits is 90, while the sum is 21.

The square root of 11191251 is about 3345.3327188786. The cubic root of 11191251 is about 223.6795148498.

The spelling of 11191251 in words is "eleven million, one hundred ninety-one thousand, two hundred fifty-one".