15682139 has 4 divisors (see below), whose sum is σ = 17107800. Its totient is φ = 14256480.

The previous prime is 15682133. The next prime is 15682151. The reversal of 15682139 is 93128651.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15682139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15682099 and 15682108.

It is not an unprimeable number, because it can be changed into a prime (15682133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 712814 + ... + 712835.

It is an arithmetic number, because the mean of its divisors is an integer number (4276950).

Almost surely, 2^15682139 is an apocalyptic number.

15682139 is a deficient number, since it is larger than the sum of its proper divisors (1425661).

15682139 is a wasteful number, since it uses less digits than its factorization.

15682139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1425660.

The product of its digits is 12960, while the sum is 35.

The square root of 15682139 is about 3960.0680549708. The cubic root of 15682139 is about 250.3043706171.

The spelling of 15682139 in words is "fifteen million, six hundred eighty-two thousand, one hundred thirty-nine".