16872445 has 4 divisors (see below), whose sum is σ = 20246940. Its totient is φ = 13497952.

The previous prime is 16872439. The next prime is 16872451. The reversal of 16872445 is 54427861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54427861 = 89 ⋅611549.

It is an interprime number because it is at equal distance from previous prime (16872439) and next prime (16872451).

It can be written as a sum of positive squares in 2 ways, for example, as 10830681 + 6041764 = 3291^2 + 2458^2 .

It is a cyclic number.

It is not a de Polignac number, because 16872445 - 2²³ = 8483837 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1687240 + ... + 1687249.

It is an arithmetic number, because the mean of its divisors is an integer number (5061735).

Almost surely, 2^16872445 is an apocalyptic number.

It is an amenable number.

16872445 is a deficient number, since it is larger than the sum of its proper divisors (3374495).

16872445 is an equidigital number, since it uses as much as digits as its factorization.

16872445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3374494.

The product of its digits is 53760, while the sum is 37.

The square root of 16872445 is about 4107.6081848200. The cubic root of 16872445 is about 256.4834461969.

The spelling of 16872445 in words is "sixteen million, eight hundred seventy-two thousand, four hundred forty-five".