11806642 has 4 divisors (see below), whose sum is σ = 17709966. Its totient is φ = 5903320.

The previous prime is 11806633. The next prime is 11806649. The reversal of 11806642 is 24660811.

11806642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24660811 = 7 ⋅3522973.

It can be written as a sum of positive squares in only one way, i.e., 11148921 + 657721 = 3339^2 + 811^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11806642.

It is not an unprimeable number, because it can be changed into a prime (11806649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2951659 + ... + 2951662.

Almost surely, 2^11806642 is an apocalyptic number.

11806642 is a deficient number, since it is larger than the sum of its proper divisors (5903324).

11806642 is an equidigital number, since it uses as much as digits as its factorization.

11806642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5903323.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 11806642 is about 3436.0794519336. The cubic root of 11806642 is about 227.7065193891.

The spelling of 11806642 in words is "eleven million, eight hundred six thousand, six hundred forty-two".