9964257 has 4 divisors (see below), whose sum is σ = 13285680. Its totient is φ = 6642836.

The previous prime is 9964247. The next prime is 9964259. The reversal of 9964257 is 7524699.

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 a cyclic number.

It is not a de Polignac number, because 9964257 - 2¹⁵ = 9931489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9964259) 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, 1660707 + ... + 1660712.

It is an arithmetic number, because the mean of its divisors is an integer number (3321420).

Almost surely, 2^9964257 is an apocalyptic number.

It is an amenable number.

9964257 is a deficient number, since it is larger than the sum of its proper divisors (3321423).

9964257 is a wasteful number, since it uses less digits than its factorization.

9964257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3321422.

The product of its digits is 136080, while the sum is 42.

The square root of 9964257 is about 3156.6211365953. The cubic root of 9964257 is about 215.1864760391.

It can be divided in two parts, 99642 and 57, that added together give a palindrome (99699).

The spelling of 9964257 in words is "nine million, nine hundred sixty-four thousand, two hundred fifty-seven".