72585122 has 4 divisors (see below), whose sum is σ = 108877686. Its totient is φ = 36292560.

The previous prime is 72585109. The next prime is 72585131. The reversal of 72585122 is 22158527.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 70241161 + 2343961 = 8381^2 + 1531^2 .

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 as a sum of consecutive naturals, namely, 18146279 + ... + 18146282.

Almost surely, 2^72585122 is an apocalyptic number.

72585122 is a deficient number, since it is larger than the sum of its proper divisors (36292564).

72585122 is a wasteful number, since it uses less digits than its factorization.

72585122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36292563.

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

The square root of 72585122 is about 8519.6902525855. The cubic root of 72585122 is about 417.1406725774.

The spelling of 72585122 in words is "seventy-two million, five hundred eighty-five thousand, one hundred twenty-two".