64245015 has 16 divisors (see below), whose sum is σ = 114213600. Its totient is φ = 34263936.

The previous prime is 64245011. The next prime is 64245019. The reversal of 64245015 is 51054246.

64245015 is a `hidden beast` number, since 642 + 4 + 5 + 0 + 15 = 666.

It is an interprime number because it is at equal distance from previous prime (64245011) and next prime (64245019).

It is not a de Polignac number, because 64245015 - 2² = 64245011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 64245015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64245011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 237810 + ... + 238079.

It is an arithmetic number, because the mean of its divisors is an integer number (7138350).

Almost surely, 2^64245015 is an apocalyptic number.

64245015 is a deficient number, since it is larger than the sum of its proper divisors (49968585).

64245015 is a wasteful number, since it uses less digits than its factorization.

64245015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475903 (or 475897 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 64245015 is about 8015.2988091524. The cubic root of 64245015 is about 400.5097979059.

The spelling of 64245015 in words is "sixty-four million, two hundred forty-five thousand, fifteen".