13634642 has 18 divisors (see below), whose sum is σ = 23855013. Its totient is φ = 5827752.

The previous prime is 13634639. The next prime is 13634681. The reversal of 13634642 is 24643631.

It can be written as a sum of positive squares in 2 ways, for example, as 13608721 + 25921 = 3689^2 + 161^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=2611.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 36368 + ... + 36740.

Almost surely, 2^13634642 is an apocalyptic number.

13634642 is a deficient number, since it is larger than the sum of its proper divisors (10220371).

13634642 is an frugal number, since it uses more digits than its factorization.

13634642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762 (or 382 counting only the distinct ones).

The product of its digits is 10368, while the sum is 29.

The square root of 13634642 is about 3692.5116113562. The cubic root of 13634642 is about 238.8991363751.

Multiplying 13634642 by its product of digits (10368), we get a square (141363968256 = 375984²).

The spelling of 13634642 in words is "thirteen million, six hundred thirty-four thousand, six hundred forty-two".