13561506 has 40 divisors (see below), whose sum is σ = 34731840. Its totient is φ = 3874392.

The previous prime is 13561487. The next prime is 13561507. The reversal of 13561506 is 60516531.

It is a happy number.

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

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 13561506.

It is not an unprimeable number, because it can be changed into a prime (13561507) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4846 + ... + 7113.

It is an arithmetic number, because the mean of its divisors is an integer number (868296).

Almost surely, 2^13561506 is an apocalyptic number.

13561506 is an abundant number, since it is smaller than the sum of its proper divisors (21170334).

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

13561506 is a wasteful number, since it uses less digits than its factorization.

13561506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11980 (or 11971 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 13561506 is about 3682.5950089577. The cubic root of 13561506 is about 238.4712199757.

The spelling of 13561506 in words is "thirteen million, five hundred sixty-one thousand, five hundred six".