72321526 has 8 divisors (see below), whose sum is σ = 108717984. Its totient is φ = 36082200.

The previous prime is 72321517. The next prime is 72321527. The reversal of 72321526 is 62512327.

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

It is a junction number, because it is equal to n+sod(n) for n = 72321494 and 72321503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72321527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38125 + ... + 39976.

It is an arithmetic number, because the mean of its divisors is an integer number (13589748).

Almost surely, 2^72321526 is an apocalyptic number.

72321526 is a deficient number, since it is larger than the sum of its proper divisors (36396458).

72321526 is a wasteful number, since it uses less digits than its factorization.

72321526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78566.

The product of its digits is 5040, while the sum is 28.

The square root of 72321526 is about 8504.2063709673. The cubic root of 72321526 is about 416.6351053072.

The spelling of 72321526 in words is "seventy-two million, three hundred twenty-one thousand, five hundred twenty-six".