16872157 has 4 divisors (see below), whose sum is σ = 17075520. Its totient is φ = 16668796.

The previous prime is 16872137. The next prime is 16872161. The reversal of 16872157 is 75127861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75127861 = 7681 ⋅9781.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16872157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16872127) 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, 101557 + ... + 101722.

It is an arithmetic number, because the mean of its divisors is an integer number (4268880).

Almost surely, 2^16872157 is an apocalyptic number.

It is an amenable number.

16872157 is a deficient number, since it is larger than the sum of its proper divisors (203363).

16872157 is an equidigital number, since it uses as much as digits as its factorization.

16872157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203362.

The product of its digits is 23520, while the sum is 37.

The square root of 16872157 is about 4107.5731277727. The cubic root of 16872157 is about 256.4819868618.

It can be divided in two parts, 1687 and 2157, that added together give a square (3844 = 62²).

The spelling of 16872157 in words is "sixteen million, eight hundred seventy-two thousand, one hundred fifty-seven".