72241605 has 16 divisors (see below), whose sum is σ = 128429760. Its totient is φ = 38528784.

The previous prime is 72241601. The next prime is 72241613. The reversal of 72241605 is 50614227.

It is not a de Polignac number, because 72241605 - 2² = 72241601 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72241601) 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, 267427 + ... + 267696.

It is an arithmetic number, because the mean of its divisors is an integer number (8026860).

Almost surely, 2^72241605 is an apocalyptic number.

It is an amenable number.

72241605 is a deficient number, since it is larger than the sum of its proper divisors (56188155).

72241605 is a wasteful number, since it uses less digits than its factorization.

72241605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535137 (or 535131 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 72241605 is about 8499.5061621250. The cubic root of 72241605 is about 416.4815771705.

It can be divided in two parts, 7224 and 1605, that multiplied together give a triangular number (11594520 = T₄₈₁₅).

The spelling of 72241605 in words is "seventy-two million, two hundred forty-one thousand, six hundred five".