13581642 has 16 divisors (see below), whose sum is σ = 27227520. Its totient is φ = 4516512.

The previous prime is 13581641. The next prime is 13581643. The reversal of 13581642 is 24618531.

It is an interprime number because it is at equal distance from previous prime (13581641) and next prime (13581643).

It is not an unprimeable number, because it can be changed into a prime (13581641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 334 + ... + 5222.

It is an arithmetic number, because the mean of its divisors is an integer number (1701720).

Almost surely, 2^13581642 is an apocalyptic number.

13581642 is an abundant number, since it is smaller than the sum of its proper divisors (13645878).

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

13581642 is a wasteful number, since it uses less digits than its factorization.

13581642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5357.

The product of its digits is 5760, while the sum is 30.

The square root of 13581642 is about 3685.3279365614. The cubic root of 13581642 is about 238.5891882372.

The spelling of 13581642 in words is "thirteen million, five hundred eighty-one thousand, six hundred forty-two".