13942805 has 12 divisors (see below), whose sum is σ = 17775300. Its totient is φ = 10497024.

The previous prime is 13942783. The next prime is 13942811. The reversal of 13942805 is 50824931.

It can be written as a sum of positive squares in 6 ways, for example, as 49 + 13942756 = 7^2 + 3734^2 .

It is not a de Polignac number, because 13942805 - 2⁶ = 13942741 is a prime.

It is a super-2 number, since 2×13942805² = 388803622536050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3380 + ... + 6269.

It is an arithmetic number, because the mean of its divisors is an integer number (1481275).

Almost surely, 2^13942805 is an apocalyptic number.

It is an amenable number.

13942805 is a deficient number, since it is larger than the sum of its proper divisors (3832495).

13942805 is an equidigital number, since it uses as much as digits as its factorization.

13942805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9688 (or 9671 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 13942805 is about 3734.0065613226. The cubic root of 13942805 is about 240.6855687185.

The spelling of 13942805 in words is "thirteen million, nine hundred forty-two thousand, eight hundred five".