16297945 has 12 divisors (see below), whose sum is σ = 20108844. Its totient is φ = 12680640.

The previous prime is 16297943. The next prime is 16297969. The reversal of 16297945 is 54979261.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 576 + 16297369 = 24^2 + 4037^2 .

It is not a de Polignac number, because 16297945 - 2¹ = 16297943 is a prime.

It is a super-2 number, since 2×16297945² = 531246022446050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16297943) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5655 + ... + 8035.

It is an arithmetic number, because the mean of its divisors is an integer number (1675737).

Almost surely, 2^16297945 is an apocalyptic number.

It is an amenable number.

16297945 is a deficient number, since it is larger than the sum of its proper divisors (3810899).

16297945 is an equidigital number, since it uses as much as digits as its factorization.

16297945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2460 (or 2423 counting only the distinct ones).

The product of its digits is 136080, while the sum is 43.

The square root of 16297945 is about 4037.0713394737. The cubic root of 16297945 is about 253.5387136831.

The spelling of 16297945 in words is "sixteen million, two hundred ninety-seven thousand, nine hundred forty-five".