72294621 has 16 divisors (see below), whose sum is σ = 110400000. Its totient is φ = 41222448.

The previous prime is 72294619. The next prime is 72294631. The reversal of 72294621 is 12649227.

It is not a de Polignac number, because 72294621 - 2¹ = 72294619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72294631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7030 + ... + 13928.

It is an arithmetic number, because the mean of its divisors is an integer number (6900000).

Almost surely, 2^72294621 is an apocalyptic number.

It is an amenable number.

72294621 is a deficient number, since it is larger than the sum of its proper divisors (38105379).

72294621 is a wasteful number, since it uses less digits than its factorization.

72294621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7408.

The product of its digits is 12096, while the sum is 33.

The square root of 72294621 is about 8502.6243595728. The cubic root of 72294621 is about 416.5834334722.

The spelling of 72294621 in words is "seventy-two million, two hundred ninety-four thousand, six hundred twenty-one".