72865065 has 32 divisors (see below), whose sum is σ = 143490816. Its totient is φ = 30746880.

The previous prime is 72865061. The next prime is 72865103. The reversal of 72865065 is 56056827.

It is a happy number.

It is not a de Polignac number, because 72865065 - 2² = 72865061 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72865061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25326 + ... + 28055.

It is an arithmetic number, because the mean of its divisors is an integer number (4484088).

Almost surely, 2^72865065 is an apocalyptic number.

It is an amenable number.

72865065 is a deficient number, since it is larger than the sum of its proper divisors (70625751).

72865065 is a wasteful number, since it uses less digits than its factorization.

72865065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53409.

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 72865065 is about 8536.1036193336. The cubic root of 72865065 is about 417.6762543605.

The spelling of 72865065 in words is "seventy-two million, eight hundred sixty-five thousand, sixty-five".