72741215 has 32 divisors (see below), whose sum is σ = 98781120. Its totient is φ = 51093504.

The previous prime is 72741211. The next prime is 72741217. The reversal of 72741215 is 51214727.

72741215 = 402² + 403² + ... + 656².

It is a cyclic number.

It is not a de Polignac number, because 72741215 - 2² = 72741211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72741211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117587 + ... + 118203.

It is an arithmetic number, because the mean of its divisors is an integer number (3086910).

Almost surely, 2^72741215 is an apocalyptic number.

72741215 is a deficient number, since it is larger than the sum of its proper divisors (26039905).

72741215 is a wasteful number, since it uses less digits than its factorization.

72741215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731.

The product of its digits is 3920, while the sum is 29.

The square root of 72741215 is about 8528.8460532478. The cubic root of 72741215 is about 417.4394763281.

The spelling of 72741215 in words is "seventy-two million, seven hundred forty-one thousand, two hundred fifteen".