72321842 has 16 divisors (see below), whose sum is σ = 116053560. Its totient is φ = 33681408.

The previous prime is 72321841. The next prime is 72321857. The reversal of 72321842 is 24812327.

It can be written as a sum of positive squares in 4 ways, for example, as 71757841 + 564001 = 8471^2 + 751^2 .

It is not an unprimeable number, because it can be changed into a prime (72321841) 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, 7667 + ... + 14262.

Almost surely, 2^72321842 is an apocalyptic number.

72321842 is a deficient number, since it is larger than the sum of its proper divisors (43731718).

72321842 is a wasteful number, since it uses less digits than its factorization.

72321842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22045.

The product of its digits is 5376, while the sum is 29.

The square root of 72321842 is about 8504.2249499881. The cubic root of 72321842 is about 416.6357121182.

The spelling of 72321842 in words is "seventy-two million, three hundred twenty-one thousand, eight hundred forty-two".