15839242 has 4 divisors (see below), whose sum is σ = 23758866. Its totient is φ = 7919620.

The previous prime is 15839231. The next prime is 15839251. The reversal of 15839242 is 24293851.

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., 12383361 + 3455881 = 3519^2 + 1859^2 .

It is a junction number, because it is equal to n+sod(n) for n = 15839198 and 15839207.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3959809 + ... + 3959812.

Almost surely, 2^15839242 is an apocalyptic number.

15839242 is a deficient number, since it is larger than the sum of its proper divisors (7919624).

15839242 is an equidigital number, since it uses as much as digits as its factorization.

15839242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7919623.

The product of its digits is 17280, while the sum is 34.

The square root of 15839242 is about 3979.8545199542. The cubic root of 15839242 is about 251.1374410628.

The spelling of 15839242 in words is "fifteen million, eight hundred thirty-nine thousand, two hundred forty-two".