16875945 has 20 divisors (see below), whose sum is σ = 30252420. Its totient is φ = 9000288.

The previous prime is 16875931. The next prime is 16875967. The reversal of 16875945 is 54957861.

It can be written as a sum of positive squares in 2 ways, for example, as 4173849 + 12702096 = 2043^2 + 3564^2 .

It is not a de Polignac number, because 16875945 - 2⁸ = 16875689 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 16875945.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 20430 + ... + 21239.

It is an arithmetic number, because the mean of its divisors is an integer number (1512621).

Almost surely, 2^16875945 is an apocalyptic number.

16875945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16875945 is a deficient number, since it is larger than the sum of its proper divisors (13376475).

16875945 is an equidigital number, since it uses as much as digits as its factorization.

16875945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41686 (or 41677 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 16875945 is about 4108.0342014156. The cubic root of 16875945 is about 256.5011798448.

The spelling of 16875945 in words is "sixteen million, eight hundred seventy-five thousand, nine hundred forty-five".