15712138 has 8 divisors (see below), whose sum is σ = 25381188. Its totient is φ = 7251744.

The previous prime is 15712127. The next prime is 15712153. The reversal of 15712138 is 83121751.

It can be written as a sum of positive squares in 2 ways, for example, as 15657849 + 54289 = 3957^2 + 233^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 302131 + ... + 302182.

Almost surely, 2^15712138 is an apocalyptic number.

15712138 is a deficient number, since it is larger than the sum of its proper divisors (9669050).

15712138 is a wasteful number, since it uses less digits than its factorization.

15712138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604328.

The product of its digits is 1680, while the sum is 28.

The square root of 15712138 is about 3963.8539327276. The cubic root of 15712138 is about 250.4638747485.

Adding to 15712138 its reverse (83121751), we get a palindrome (98833889).

The spelling of 15712138 in words is "fifteen million, seven hundred twelve thousand, one hundred thirty-eight".