13501906 has 12 divisors (see below), whose sum is σ = 22261806. Its totient is φ = 6137120.

The previous prime is 13501883. The next prime is 13501919. The reversal of 13501906 is 60910531.

It can be written as a sum of positive squares in only one way, i.e., 13256881 + 245025 = 3641^2 + 495^2 .

It is an unprimeable number.

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, 27655 + ... + 28138.

Almost surely, 2^13501906 is an apocalyptic number.

13501906 is a deficient number, since it is larger than the sum of its proper divisors (8759900).

13501906 is a wasteful number, since it uses less digits than its factorization.

13501906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55817 (or 55806 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 25.

The square root of 13501906 is about 3674.4939787677. The cubic root of 13501906 is about 238.1213631435.

The spelling of 13501906 in words is "thirteen million, five hundred one thousand, nine hundred six".