72245865 has 16 divisors (see below), whose sum is σ = 116676288. Its totient is φ = 38170176.

The previous prime is 72245863. The next prime is 72245897. The reversal of 72245865 is 56854227.

It is not a de Polignac number, because 72245865 - 2¹ = 72245863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72245863) 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, 20902 + ... + 24111.

It is an arithmetic number, because the mean of its divisors is an integer number (7292268).

Almost surely, 2^72245865 is an apocalyptic number.

It is an amenable number.

72245865 is a deficient number, since it is larger than the sum of its proper divisors (44430423).

72245865 is a wasteful number, since it uses less digits than its factorization.

72245865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45128.

The product of its digits is 134400, while the sum is 39.

The square root of 72245865 is about 8499.7567612256. The cubic root of 72245865 is about 416.4897634810.

The spelling of 72245865 in words is "seventy-two million, two hundred forty-five thousand, eight hundred sixty-five".