72734251 has 4 divisors (see below), whose sum is σ = 72751392. Its totient is φ = 72717112.

The previous prime is 72734243. The next prime is 72734309. The reversal of 72734251 is 15243727.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 72734251 - 2³ = 72734243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72734351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3021 + ... + 12433.

It is an arithmetic number, because the mean of its divisors is an integer number (18187848).

Almost surely, 2^72734251 is an apocalyptic number.

72734251 is a deficient number, since it is larger than the sum of its proper divisors (17141).

72734251 is an equidigital number, since it uses as much as digits as its factorization.

72734251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17140.

The product of its digits is 11760, while the sum is 31.

The square root of 72734251 is about 8528.4377819153. The cubic root of 72734251 is about 417.4261544845.

Adding to 72734251 its reverse (15243727), we get a palindrome (87977978).

The spelling of 72734251 in words is "seventy-two million, seven hundred thirty-four thousand, two hundred fifty-one".