12542439 has 16 divisors (see below), whose sum is σ = 20582912. Its totient is φ = 6615648.

The previous prime is 12542437. The next prime is 12542449. The reversal of 12542439 is 93424521.

It is not a de Polignac number, because 12542439 - 2¹ = 12542437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12542437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22699 + ... + 23244.

It is an arithmetic number, because the mean of its divisors is an integer number (1286432).

Almost surely, 2^12542439 is an apocalyptic number.

12542439 is a deficient number, since it is larger than the sum of its proper divisors (8040473).

12542439 is a wasteful number, since it uses less digits than its factorization.

12542439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45966.

The product of its digits is 8640, while the sum is 30.

The square root of 12542439 is about 3541.5306013079. The cubic root of 12542439 is about 232.3417908533.

The spelling of 12542439 in words is "twelve million, five hundred forty-two thousand, four hundred thirty-nine".