72451805 has 8 divisors (see below), whose sum is σ = 89746944. Its totient is φ = 56091600.

The previous prime is 72451793. The next prime is 72451829. The reversal of 72451805 is 50815427.

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

It is not a de Polignac number, because 72451805 - 2⁴ = 72451789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 233561 + ... + 233870.

It is an arithmetic number, because the mean of its divisors is an integer number (11218368).

Almost surely, 2^72451805 is an apocalyptic number.

It is an amenable number.

72451805 is a deficient number, since it is larger than the sum of its proper divisors (17295139).

72451805 is a wasteful number, since it uses less digits than its factorization.

72451805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467467.

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 72451805 is about 8511.8626046242. The cubic root of 72451805 is about 416.8851288161.

The spelling of 72451805 in words is "seventy-two million, four hundred fifty-one thousand, eight hundred five".