12497539 has 4 divisors (see below), whose sum is σ = 12509056. Its totient is φ = 12486024.

The previous prime is 12497503. The next prime is 12497561. The reversal of 12497539 is 93579421.

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

It is a cyclic number.

It is not a de Polignac number, because 12497539 - 2¹⁷ = 12366467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12497339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3939 + ... + 6364.

It is an arithmetic number, because the mean of its divisors is an integer number (3127264).

Almost surely, 2^12497539 is an apocalyptic number.

12497539 is a deficient number, since it is larger than the sum of its proper divisors (11517).

12497539 is a wasteful number, since it uses less digits than its factorization.

12497539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11516.

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

The square root of 12497539 is about 3535.1858508429. The cubic root of 12497539 is about 232.0642100808.

The spelling of 12497539 in words is "twelve million, four hundred ninety-seven thousand, five hundred thirty-nine".