13404139 has 16 divisors (see below), whose sum is σ = 16307200. Its totient is φ = 10761984.

The previous prime is 13404137. The next prime is 13404163. The reversal of 13404139 is 93140431.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 13404139 - 2¹ = 13404137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13404133) 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, 12382 + ... + 13420.

It is an arithmetic number, because the mean of its divisors is an integer number (1019200).

Almost surely, 2^13404139 is an apocalyptic number.

13404139 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

13404139 is a deficient number, since it is larger than the sum of its proper divisors (2903061).

13404139 is a wasteful number, since it uses less digits than its factorization.

13404139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 13404139 is about 3661.1663442133. The cubic root of 13404139 is about 237.5452264748.

The spelling of 13404139 in words is "thirteen million, four hundred four thousand, one hundred thirty-nine".