72941421 has 16 divisors (see below), whose sum is σ = 112972928. Its totient is φ = 40996800.

The previous prime is 72941377. The next prime is 72941423. The reversal of 72941421 is 12414927.

It is not a de Polignac number, because 72941421 - 2⁹ = 72940909 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 (72941423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27190 + ... + 29751.

It is an arithmetic number, because the mean of its divisors is an integer number (7060808).

Almost surely, 2^72941421 is an apocalyptic number.

It is an amenable number.

72941421 is a deficient number, since it is larger than the sum of its proper divisors (40031507).

72941421 is a wasteful number, since it uses less digits than its factorization.

72941421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57012.

The product of its digits is 4032, while the sum is 30.

The square root of 72941421 is about 8540.5749806439. The cubic root of 72941421 is about 417.8220990784.

The spelling of 72941421 in words is "seventy-two million, nine hundred forty-one thousand, four hundred twenty-one".