11861642 has 16 divisors (see below), whose sum is σ = 19355112. Its totient is φ = 5419200.

The previous prime is 11861639. The next prime is 11861659. The reversal of 11861642 is 24616811.

It can be written as a sum of positive squares in 4 ways, for example, as 7447441 + 4414201 = 2729^2 + 2101^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 368 + ... + 4884.

Almost surely, 2^11861642 is an apocalyptic number.

11861642 is a deficient number, since it is larger than the sum of its proper divisors (7493470).

11861642 is a wasteful number, since it uses less digits than its factorization.

11861642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4633.

The product of its digits is 2304, while the sum is 29.

The square root of 11861642 is about 3444.0734603083. The cubic root of 11861642 is about 228.0595540542.

The spelling of 11861642 in words is "eleven million, eight hundred sixty-one thousand, six hundred forty-two".