11556642 has 32 divisors (see below), whose sum is σ = 23887872. Its totient is φ = 3725264.

The previous prime is 11556641. The next prime is 11556653. The reversal of 11556642 is 24665511.

It is not an unprimeable number, because it can be changed into a prime (11556641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29983 + ... + 30365.

It is an arithmetic number, because the mean of its divisors is an integer number (746496).

Almost surely, 2^11556642 is an apocalyptic number.

11556642 is an abundant number, since it is smaller than the sum of its proper divisors (12331230).

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

11556642 is a wasteful number, since it uses less digits than its factorization.

11556642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542.

The product of its digits is 7200, while the sum is 30.

The square root of 11556642 is about 3399.5061406034. The cubic root of 11556642 is about 226.0878479587.

The spelling of 11556642 in words is "eleven million, five hundred fifty-six thousand, six hundred forty-two".