15860242 has 4 divisors (see below), whose sum is σ = 23790366. Its totient is φ = 7930120.

The previous prime is 15860239. The next prime is 15860267. The reversal of 15860242 is 24206851.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15848361 + 11881 = 3981^2 + 109^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 15860242.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3965059 + ... + 3965062.

Almost surely, 2^15860242 is an apocalyptic number.

15860242 is a deficient number, since it is larger than the sum of its proper divisors (7930124).

15860242 is an equidigital number, since it uses as much as digits as its factorization.

15860242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7930123.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 15860242 is about 3982.4919334507. The cubic root of 15860242 is about 251.2483798151.

The spelling of 15860242 in words is "fifteen million, eight hundred sixty thousand, two hundred forty-two".