64257305 has 8 divisors (see below), whose sum is σ = 88124352. Its totient is φ = 44062128.

The previous prime is 64257289. The next prime is 64257329. The reversal of 64257305 is 50375246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64257305 - 2⁴ = 64257289 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 917927 + ... + 917996.

It is an arithmetic number, because the mean of its divisors is an integer number (11015544).

Almost surely, 2^64257305 is an apocalyptic number.

It is an amenable number.

64257305 is a deficient number, since it is larger than the sum of its proper divisors (23867047).

64257305 is a wasteful number, since it uses less digits than its factorization.

64257305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1835935.

The product of its (nonzero) digits is 25200, while the sum is 32.

The square root of 64257305 is about 8016.0654313697. The cubic root of 64257305 is about 400.5353353040.

The spelling of 64257305 in words is "sixty-four million, two hundred fifty-seven thousand, three hundred five".