12307157 has 4 divisors (see below), whose sum is σ = 12455520. Its totient is φ = 12158796.

The previous prime is 12307109. The next prime is 12307171. The reversal of 12307157 is 75170321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12307157 - 2¹² = 12303061 is a prime.

It is a super-2 number, since 2×12307157² = 302932226845298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12307357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74057 + ... + 74222.

It is an arithmetic number, because the mean of its divisors is an integer number (3113880).

Almost surely, 2^12307157 is an apocalyptic number.

It is an amenable number.

12307157 is a deficient number, since it is larger than the sum of its proper divisors (148363).

12307157 is an equidigital number, since it uses as much as digits as its factorization.

12307157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148362.

The product of its (nonzero) digits is 1470, while the sum is 26.

The square root of 12307157 is about 3508.1557833141. The cubic root of 12307157 is about 230.8797872799.

Adding to 12307157 its reverse (75170321), we get a palindrome (87477478).

The spelling of 12307157 in words is "twelve million, three hundred seven thousand, one hundred fifty-seven".