13405642 has 16 divisors (see below), whose sum is σ = 21176640. Its totient is φ = 6352192.

The previous prime is 13405633. The next prime is 13405657. The reversal of 13405642 is 24650431.

13405642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×13405642² = 359422474864328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3909 + ... + 6487.

It is an arithmetic number, because the mean of its divisors is an integer number (1323540).

Almost surely, 2^13405642 is an apocalyptic number.

13405642 is a deficient number, since it is larger than the sum of its proper divisors (7770998).

13405642 is a wasteful number, since it uses less digits than its factorization.

13405642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2717.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 13405642 is about 3661.3716009168. The cubic root of 13405642 is about 237.5541047557.

The spelling of 13405642 in words is "thirteen million, four hundred five thousand, six hundred forty-two".