64817245 has 4 divisors (see below), whose sum is σ = 77780700. Its totient is φ = 51853792.

The previous prime is 64817231. The next prime is 64817309. The reversal of 64817245 is 54271846.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39476089 + 25341156 = 6283^2 + 5034^2 .

It is a cyclic number.

It is not a de Polignac number, because 64817245 - 2⁵ = 64817213 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6481720 + ... + 6481729.

It is an arithmetic number, because the mean of its divisors is an integer number (19445175).

Almost surely, 2^64817245 is an apocalyptic number.

It is an amenable number.

64817245 is a deficient number, since it is larger than the sum of its proper divisors (12963455).

64817245 is a wasteful number, since it uses less digits than its factorization.

64817245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12963454.

The product of its digits is 53760, while the sum is 37.

The square root of 64817245 is about 8050.9157864183. The cubic root of 64817245 is about 401.6953976644.

The spelling of 64817245 in words is "sixty-four million, eight hundred seventeen thousand, two hundred forty-five".