11399251 has 4 divisors (see below), whose sum is σ = 11481400. Its totient is φ = 11317104.

The previous prime is 11399249. The next prime is 11399261. The reversal of 11399251 is 15299311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15299311 = 103 ⋅148537.

It is a cyclic number.

It is not a de Polignac number, because 11399251 - 2¹ = 11399249 is a prime.

It is a super-2 number, since 2×11399251² = 259885846722002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11399261) 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, 40866 + ... + 41143.

It is an arithmetic number, because the mean of its divisors is an integer number (2870350).

Almost surely, 2^11399251 is an apocalyptic number.

11399251 is a deficient number, since it is larger than the sum of its proper divisors (82149).

11399251 is an equidigital number, since it uses as much as digits as its factorization.

11399251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82148.

The product of its digits is 2430, while the sum is 31.

The square root of 11399251 is about 3376.2776840775. The cubic root of 11399251 is about 225.0567823767.

The spelling of 11399251 in words is "eleven million, three hundred ninety-nine thousand, two hundred fifty-one".