13149904 has 10 divisors (see below), whose sum is σ = 25477970. Its totient is φ = 6574944.

The previous prime is 13149901. The next prime is 13149931. The reversal of 13149904 is 40994131.

It can be written as a sum of positive squares in only one way, i.e., 9909904 + 3240000 = 3148^2 + 1800^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13149901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410919 + ... + 410950.

It is an arithmetic number, because the mean of its divisors is an integer number (2547797).

Almost surely, 2^13149904 is an apocalyptic number.

It is an amenable number.

13149904 is a deficient number, since it is larger than the sum of its proper divisors (12328066).

13149904 is an equidigital number, since it uses as much as digits as its factorization.

13149904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821877 (or 821871 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 13149904 is about 3626.2796362112. The cubic root of 13149904 is about 236.0337977067.

The spelling of 13149904 in words is "thirteen million, one hundred forty-nine thousand, nine hundred four".