11311257 has 8 divisors (see below), whose sum is σ = 15220480. Its totient is φ = 7471440.

The previous prime is 11311253. The next prime is 11311283. The reversal of 11311257 is 75211311.

It is a happy number.

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

It is not a de Polignac number, because 11311257 - 2² = 11311253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11311253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16969 + ... + 17622.

It is an arithmetic number, because the mean of its divisors is an integer number (1902560).

Almost surely, 2^11311257 is an apocalyptic number.

It is an amenable number.

11311257 is a deficient number, since it is larger than the sum of its proper divisors (3909223).

11311257 is a wasteful number, since it uses less digits than its factorization.

11311257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34703.

The product of its digits is 210, while the sum is 21.

The square root of 11311257 is about 3363.2212237675. The cubic root of 11311257 is about 224.4761938570.

Adding to 11311257 its reverse (75211311), we get a palindrome (86522568).

The spelling of 11311257 in words is "eleven million, three hundred eleven thousand, two hundred fifty-seven".