12501239 has 4 divisors (see below), whose sum is σ = 13236624. Its totient is φ = 11765856.

The previous prime is 12501193. The next prime is 12501257. The reversal of 12501239 is 93210521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93210521 = 31 ⋅3006791.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12501239 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 (12501739) 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, 367667 + ... + 367700.

It is an arithmetic number, because the mean of its divisors is an integer number (3309156).

Almost surely, 2^12501239 is an apocalyptic number.

12501239 is a deficient number, since it is larger than the sum of its proper divisors (735385).

12501239 is an equidigital number, since it uses as much as digits as its factorization.

12501239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735384.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 12501239 is about 3535.7091226514. The cubic root of 12501239 is about 232.0871093321.

The spelling of 12501239 in words is "twelve million, five hundred one thousand, two hundred thirty-nine".