12135157 has 4 divisors (see below), whose sum is σ = 12334156. Its totient is φ = 11936160.

The previous prime is 12135143. The next prime is 12135163. The reversal of 12135157 is 75153121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2187441 + 9947716 = 1479^2 + 3154^2 .

It is a cyclic number.

It is not a de Polignac number, because 12135157 - 2²³ = 3746549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12135197) 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, 99408 + ... + 99529.

It is an arithmetic number, because the mean of its divisors is an integer number (3083539).

Almost surely, 2^12135157 is an apocalyptic number.

It is an amenable number.

12135157 is a deficient number, since it is larger than the sum of its proper divisors (198999).

12135157 is an equidigital number, since it uses as much as digits as its factorization.

12135157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198998.

The product of its digits is 1050, while the sum is 25.

The square root of 12135157 is about 3483.5552241927. Note that the first 3 decimals coincide. The cubic root of 12135157 is about 229.7991756781.

Adding to 12135157 its reverse (75153121), we get a palindrome (87288278).

The spelling of 12135157 in words is "twelve million, one hundred thirty-five thousand, one hundred fifty-seven".