16396257 has 4 divisors (see below), whose sum is σ = 21861680. Its totient is φ = 10930836.

The previous prime is 16396253. The next prime is 16396267. The reversal of 16396257 is 75269361.

16396257 is nontrivially palindromic in base 11.

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.

It is not a de Polignac number, because 16396257 - 2² = 16396253 is a prime.

It is a super-2 number, since 2×16396257² = 537674487220098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16396253) 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, 2732707 + ... + 2732712.

It is an arithmetic number, because the mean of its divisors is an integer number (5465420).

Almost surely, 2^16396257 is an apocalyptic number.

It is an amenable number.

16396257 is a deficient number, since it is larger than the sum of its proper divisors (5465423).

16396257 is an equidigital number, since it uses as much as digits as its factorization.

16396257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5465422.

The product of its digits is 68040, while the sum is 39.

The square root of 16396257 is about 4049.2291859069. The cubic root of 16396257 is about 254.0474883826.

It can be divided in two parts, 16396 and 257, that added together give a triangular number (16653 = T₁₈₂).

The spelling of 16396257 in words is "sixteen million, three hundred ninety-six thousand, two hundred fifty-seven".