16905245 has 12 divisors (see below), whose sum is σ = 23598684. Its totient is φ = 11592000.

The previous prime is 16905233. The next prime is 16905247. The reversal of 16905245 is 54250961.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2244004 + 14661241 = 1498^2 + 3829^2 .

It is not a de Polignac number, because 16905245 - 2⁸ = 16904989 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 (16905247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34256 + ... + 34745.

It is an arithmetic number, because the mean of its divisors is an integer number (1966557).

Almost surely, 2^16905245 is an apocalyptic number.

It is an amenable number.

16905245 is a deficient number, since it is larger than the sum of its proper divisors (6693439).

16905245 is an equidigital number, since it uses as much as digits as its factorization.

16905245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69020 (or 69013 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 16905245 is about 4111.5988374354. The cubic root of 16905245 is about 256.6495397203.

The spelling of 16905245 in words is "sixteen million, nine hundred five thousand, two hundred forty-five".