72057005 has 8 divisors (see below), whose sum is σ = 86947224. Its totient is φ = 57326400.

The previous prime is 72057001. The next prime is 72057023. The reversal of 72057005 is 50075027.

It can be written as a sum of positive squares in 4 ways, for example, as 2468041 + 69588964 = 1571^2 + 8342^2 .

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

It is not a de Polignac number, because 72057005 - 2² = 72057001 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 (72057001) 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, 38906 + ... + 40715.

It is an arithmetic number, because the mean of its divisors is an integer number (10868403).

Almost surely, 2^72057005 is an apocalyptic number.

It is an amenable number.

72057005 is a deficient number, since it is larger than the sum of its proper divisors (14890219).

72057005 is a wasteful number, since it uses less digits than its factorization.

72057005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79807.

The product of its (nonzero) digits is 2450, while the sum is 26.

The square root of 72057005 is about 8488.6397614694. The cubic root of 72057005 is about 416.1265274795.

The spelling of 72057005 in words is "seventy-two million, fifty-seven thousand, five".