72672571 has 4 divisors (see below), whose sum is σ = 75832272. Its totient is φ = 69512872.

The previous prime is 72672563. The next prime is 72672641. The reversal of 72672571 is 17527627.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72672571 - 2³ = 72672563 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72672571.

It is not an unprimeable number, because it can be changed into a prime (72672071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1579816 + ... + 1579861.

It is an arithmetic number, because the mean of its divisors is an integer number (18958068).

Almost surely, 2^72672571 is an apocalyptic number.

72672571 is a deficient number, since it is larger than the sum of its proper divisors (3159701).

72672571 is a wasteful number, since it uses less digits than its factorization.

72672571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3159700.

The product of its digits is 41160, while the sum is 37.

The square root of 72672571 is about 8524.8208778836. The cubic root of 72672571 is about 417.3081260626.

The spelling of 72672571 in words is "seventy-two million, six hundred seventy-two thousand, five hundred seventy-one".