72122571 has 6 divisors (see below), whose sum is σ = 104177060. Its totient is φ = 48081708.

The previous prime is 72122539. The next prime is 72122579. The reversal of 72122571 is 17522127.

72122571 is a `hidden beast` number, since 72 + 1 + 22 + 571 = 666.

It is not a de Polignac number, because 72122571 - 2⁵ = 72122539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72122579) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4006801 + ... + 4006818.

Almost surely, 2^72122571 is an apocalyptic number.

72122571 is a deficient number, since it is larger than the sum of its proper divisors (32054489).

72122571 is a wasteful number, since it uses less digits than its factorization.

72122571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8013625 (or 8013622 counting only the distinct ones).

The product of its digits is 1960, while the sum is 27.

The square root of 72122571 is about 8492.5008684133. The cubic root of 72122571 is about 416.2527029557.

Adding to 72122571 its reverse (17522127), we get a palindrome (89644698).

The spelling of 72122571 in words is "seventy-two million, one hundred twenty-two thousand, five hundred seventy-one".