64845245 has 4 divisors (see below), whose sum is σ = 77814300. Its totient is φ = 51876192.

The previous prime is 64845229. The next prime is 64845269. The reversal of 64845245 is 54254846.

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 29822521 + 35022724 = 5461^2 + 5918^2 .

It is a cyclic number.

It is not a de Polignac number, because 64845245 - 2⁴ = 64845229 is a prime.

It is a super-2 number, since 2×64845245² = 8409811598220050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64845199 and 64845208.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6484520 + ... + 6484529.

It is an arithmetic number, because the mean of its divisors is an integer number (19453575).

Almost surely, 2^64845245 is an apocalyptic number.

It is an amenable number.

64845245 is a deficient number, since it is larger than the sum of its proper divisors (12969055).

64845245 is a wasteful number, since it uses less digits than its factorization.

64845245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12969054.

The product of its digits is 153600, while the sum is 38.

The square root of 64845245 is about 8052.6545312710. The cubic root of 64845245 is about 401.7532313060.

The spelling of 64845245 in words is "sixty-four million, eight hundred forty-five thousand, two hundred forty-five".