12157311 has 8 divisors (see below), whose sum is σ = 16392240. Its totient is φ = 8013632.

The previous prime is 12157309. The next prime is 12157319. The reversal of 12157311 is 11375121.

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 not a de Polignac number, because 12157311 - 2¹ = 12157309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12157319) 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, 22500 + ... + 23033.

It is an arithmetic number, because the mean of its divisors is an integer number (2049030).

Almost surely, 2^12157311 is an apocalyptic number.

12157311 is a deficient number, since it is larger than the sum of its proper divisors (4234929).

12157311 is an equidigital number, since it uses as much as digits as its factorization.

12157311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45625.

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

The square root of 12157311 is about 3486.7335716972. The cubic root of 12157311 is about 229.9389314869.

The spelling of 12157311 in words is "twelve million, one hundred fifty-seven thousand, three hundred eleven".