72741321 has 24 divisors (see below), whose sum is σ = 109365984. Its totient is φ = 48314880.

The previous prime is 72741313. The next prime is 72741373. The reversal of 72741321 is 12314727.

It is a happy number.

It is not a de Polignac number, because 72741321 - 2³ = 72741313 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (72741821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113161 + ... + 113801.

It is an arithmetic number, because the mean of its divisors is an integer number (4556916).

Almost surely, 2^72741321 is an apocalyptic number.

It is an amenable number.

72741321 is a deficient number, since it is larger than the sum of its proper divisors (36624663).

72741321 is an equidigital number, since it uses as much as digits as its factorization.

72741321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123 (or 1111 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 72741321 is about 8528.8522674508. The cubic root of 72741321 is about 417.4396790952.

The spelling of 72741321 in words is "seventy-two million, seven hundred forty-one thousand, three hundred twenty-one".