12436157 has 4 divisors (see below), whose sum is σ = 12865020. Its totient is φ = 12007296.

The previous prime is 12436141. The next prime is 12436183. The reversal of 12436157 is 75163421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75163421 = 151 ⋅497771.

It can be written as a sum of positive squares in 2 ways, for example, as 6728836 + 5707321 = 2594^2 + 2389^2 .

It is a cyclic number.

It is not a de Polignac number, because 12436157 - 2⁴ = 12436141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 428833 = 12436157 / (1 + 2 + 4 + 3 + 6 + 1 + 5 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12436187) 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, 214388 + ... + 214445.

It is an arithmetic number, because the mean of its divisors is an integer number (3216255).

Almost surely, 2^12436157 is an apocalyptic number.

It is an amenable number.

12436157 is a deficient number, since it is larger than the sum of its proper divisors (428863).

12436157 is an equidigital number, since it uses as much as digits as its factorization.

12436157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428862.

The product of its digits is 5040, while the sum is 29.

The square root of 12436157 is about 3526.4935842845. The cubic root of 12436157 is about 231.6836564897.

Adding to 12436157 its reverse (75163421), we get a palindrome (87599578).

The spelling of 12436157 in words is "twelve million, four hundred thirty-six thousand, one hundred fifty-seven".