72321546 has 16 divisors (see below), whose sum is σ = 157792608. Its totient is φ = 21915600.

The previous prime is 72321541. The next prime is 72321617. The reversal of 72321546 is 64512327.

It is not an unprimeable number, because it can be changed into a prime (72321541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 547825 + ... + 547956.

It is an arithmetic number, because the mean of its divisors is an integer number (9862038).

Almost surely, 2^72321546 is an apocalyptic number.

72321546 is an abundant number, since it is smaller than the sum of its proper divisors (85471062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72321546 is a wasteful number, since it uses less digits than its factorization.

72321546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095797.

The product of its digits is 10080, while the sum is 30.

The square root of 72321546 is about 8504.2075468559. The cubic root of 72321546 is about 416.6351437130.

It can be divided in two parts, 7232 and 1546, that added together give a palindrome (8778).

The spelling of 72321546 in words is "seventy-two million, three hundred twenty-one thousand, five hundred forty-six".