72706571 has 16 divisors (see below), whose sum is σ = 86536128. Its totient is φ = 59788800.

The previous prime is 72706561. The next prime is 72706583. The reversal of 72706571 is 17560727.

It is a cyclic number.

It is not a de Polignac number, because 72706571 - 2¹⁰ = 72705547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72706531) 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, 15431 + ... + 19583.

It is an arithmetic number, because the mean of its divisors is an integer number (5408508).

Almost surely, 2^72706571 is an apocalyptic number.

72706571 is a deficient number, since it is larger than the sum of its proper divisors (13829557).

72706571 is a wasteful number, since it uses less digits than its factorization.

72706571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4262.

The product of its (nonzero) digits is 20580, while the sum is 35.

The square root of 72706571 is about 8526.8148214911. The cubic root of 72706571 is about 417.3731953818.

The spelling of 72706571 in words is "seventy-two million, seven hundred six thousand, five hundred seventy-one".