72900421 has 8 divisors (see below), whose sum is σ = 79617888. Its totient is φ = 66198000.

The previous prime is 72900391. The next prime is 72900427. The reversal of 72900421 is 12400927.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72900421 - 2⁵ = 72900389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72900427) 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 7 ways as a sum of consecutive naturals, for example, 7986 + ... + 14476.

It is an arithmetic number, because the mean of its divisors is an integer number (9952236).

Almost surely, 2^72900421 is an apocalyptic number.

It is an amenable number.

72900421 is a deficient number, since it is larger than the sum of its proper divisors (6717467).

72900421 is a wasteful number, since it uses less digits than its factorization.

72900421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7523.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 72900421 is about 8538.1743364726. The cubic root of 72900421 is about 417.7437991836.

The spelling of 72900421 in words is "seventy-two million, nine hundred thousand, four hundred twenty-one".