12311257 has 8 divisors (see below), whose sum is σ = 14093696. Its totient is φ = 10534752.

The previous prime is 12311251. The next prime is 12311261. The reversal of 12311257 is 75211321.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12311257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12311251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4693 + ... + 6829.

It is an arithmetic number, because the mean of its divisors is an integer number (1761712).

Almost surely, 2^12311257 is an apocalyptic number.

It is an amenable number.

12311257 is a deficient number, since it is larger than the sum of its proper divisors (1782439).

12311257 is an equidigital number, since it uses as much as digits as its factorization.

12311257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2967.

The product of its digits is 420, while the sum is 22.

The square root of 12311257 is about 3508.7400872678. The cubic root of 12311257 is about 230.9054228248.

Adding to 12311257 its reverse (75211321), we get a palindrome (87522578).

The spelling of 12311257 in words is "twelve million, three hundred eleven thousand, two hundred fifty-seven".