13402539 has 6 divisors (see below), whose sum is σ = 19359236. Its totient is φ = 8935020.

The previous prime is 13402517. The next prime is 13402549. The reversal of 13402539 is 93520431.

It is not a de Polignac number, because 13402539 - 2¹³ = 13394347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13402549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 744577 + ... + 744594.

Almost surely, 2^13402539 is an apocalyptic number.

13402539 is a deficient number, since it is larger than the sum of its proper divisors (5956697).

13402539 is a wasteful number, since it uses less digits than its factorization.

13402539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1489177 (or 1489174 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 13402539 is about 3660.9478280904. The cubic root of 13402539 is about 237.5357744818.

The spelling of 13402539 in words is "thirteen million, four hundred two thousand, five hundred thirty-nine".