12537949 has 4 divisors (see below), whose sum is σ = 12576160. Its totient is φ = 12499740.

The previous prime is 12537893. The next prime is 12537953. The reversal of 12537949 is 94973521.

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 a de Polignac number, because none of the positive numbers 2^k-12537949 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 (12537989) 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, 18609 + ... + 19270.

It is an arithmetic number, because the mean of its divisors is an integer number (3144040).

Almost surely, 2^12537949 is an apocalyptic number.

It is an amenable number.

12537949 is a deficient number, since it is larger than the sum of its proper divisors (38211).

12537949 is an equidigital number, since it uses as much as digits as its factorization.

12537949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38210.

The product of its digits is 68040, while the sum is 40.

The square root of 12537949 is about 3540.8966378588. The cubic root of 12537949 is about 232.3140626166.

The spelling of 12537949 in words is "twelve million, five hundred thirty-seven thousand, nine hundred forty-nine".