72145415 has 8 divisors (see below), whose sum is σ = 87341328. Its totient is φ = 57205120.

The previous prime is 72145397. The next prime is 72145427. The reversal of 72145415 is 51454127.

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

It is not a de Polignac number, because 72145415 - 2⁶ = 72145351 is a prime.

It is a Duffinian number.

It is a congruent 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, 63281 + ... + 64410.

It is an arithmetic number, because the mean of its divisors is an integer number (10917666).

Almost surely, 2^72145415 is an apocalyptic number.

72145415 is a deficient number, since it is larger than the sum of its proper divisors (15195913).

72145415 is a wasteful number, since it uses less digits than its factorization.

72145415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127809.

The product of its digits is 5600, while the sum is 29.

The square root of 72145415 is about 8493.8457132208. The cubic root of 72145415 is about 416.2966460785.

The spelling of 72145415 in words is "seventy-two million, one hundred forty-five thousand, four hundred fifteen".