16872457 has 4 divisors (see below), whose sum is σ = 19282816. Its totient is φ = 14462100.

The previous prime is 16872451. The next prime is 16872467. The reversal of 16872457 is 75427861.

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: 75427861 = 17 ⋅4436933.

It is a cyclic number.

It is not a de Polignac number, because 16872457 - 2⁷ = 16872329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16872451) 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, 1205169 + ... + 1205182.

It is an arithmetic number, because the mean of its divisors is an integer number (4820704).

Almost surely, 2^16872457 is an apocalyptic number.

It is an amenable number.

16872457 is a deficient number, since it is larger than the sum of its proper divisors (2410359).

16872457 is an equidigital number, since it uses as much as digits as its factorization.

16872457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2410358.

The product of its digits is 94080, while the sum is 40.

The square root of 16872457 is about 4107.6096455238. The cubic root of 16872457 is about 256.4835070021.

The spelling of 16872457 in words is "sixteen million, eight hundred seventy-two thousand, four hundred fifty-seven".