12531237 has 4 divisors (see below), whose sum is σ = 16708320. Its totient is φ = 8354156.

The previous prime is 12531221. The next prime is 12531247. The reversal of 12531237 is 73213521.

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, and also an emirpimes, since its reverse is a distinct semiprime: 73213521 = 3 ⋅24404507.

It is a cyclic number.

It is not a de Polignac number, because 12531237 - 2⁴ = 12531221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12531247) 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, 2088537 + ... + 2088542.

It is an arithmetic number, because the mean of its divisors is an integer number (4177080).

Almost surely, 2^12531237 is an apocalyptic number.

It is an amenable number.

12531237 is a deficient number, since it is larger than the sum of its proper divisors (4177083).

12531237 is an equidigital number, since it uses as much as digits as its factorization.

12531237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4177082.

The product of its digits is 1260, while the sum is 24.

The square root of 12531237 is about 3539.9487284423. The cubic root of 12531237 is about 232.2725999521.

Adding to 12531237 its reverse (73213521), we get a palindrome (85744758).

The spelling of 12531237 in words is "twelve million, five hundred thirty-one thousand, two hundred thirty-seven".