64247265 has 48 divisors (see below), whose sum is σ = 118198080. Its totient is φ = 32192640.

The previous prime is 64247201. The next prime is 64247273. The reversal of 64247265 is 56274246.

64247265 is a `hidden beast` number, since 642 + 4 + 7 + 2 + 6 + 5 = 666.

It is not a de Polignac number, because 64247265 - 2⁶ = 64247201 is a prime.

It is a super-2 number, since 2×64247265² = 8255422119960450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 139135 + ... + 139595.

It is an arithmetic number, because the mean of its divisors is an integer number (2462460).

Almost surely, 2^64247265 is an apocalyptic number.

It is an amenable number.

64247265 is a deficient number, since it is larger than the sum of its proper divisors (53950815).

64247265 is a wasteful number, since it uses less digits than its factorization.

64247265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654 (or 651 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 64247265 is about 8015.4391645124. The cubic root of 64247265 is about 400.5144734257.

It can be divided in two parts, 6424 and 7265, that added together give a square (13689 = 117²).

The spelling of 64247265 in words is "sixty-four million, two hundred forty-seven thousand, two hundred sixty-five".