13155642 has 16 divisors (see below), whose sum is σ = 29234880. Its totient is φ = 4385196.

The previous prime is 13155641. The next prime is 13155673. The reversal of 13155642 is 24655131.

13155642 is a `hidden beast` number, since 1 + 3 + 15 + 5 + 642 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (13155641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121758 + ... + 121865.

It is an arithmetic number, because the mean of its divisors is an integer number (1827180).

Almost surely, 2^13155642 is an apocalyptic number.

13155642 is an abundant number, since it is smaller than the sum of its proper divisors (16079238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13155642 is a wasteful number, since it uses less digits than its factorization.

13155642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243634 (or 243628 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 13155642 is about 3627.0707189135. The cubic root of 13155642 is about 236.0681240660.

The spelling of 13155642 in words is "thirteen million, one hundred fifty-five thousand, six hundred forty-two".