72645126 has 16 divisors (see below), whose sum is σ = 145395264. Its totient is φ = 24197544.

The previous prime is 72645091. The next prime is 72645187. The reversal of 72645126 is 62154627.

It is a congruent number.

It is an unprimeable number.

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, 6825 + ... + 13851.

It is an arithmetic number, because the mean of its divisors is an integer number (9087204).

Almost surely, 2^72645126 is an apocalyptic number.

72645126 is an abundant number, since it is smaller than the sum of its proper divisors (72750138).

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

72645126 is a wasteful number, since it uses less digits than its factorization.

72645126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8755.

The product of its digits is 20160, while the sum is 33.

The square root of 72645126 is about 8523.2110146353. The cubic root of 72645126 is about 417.2555869207.

It can be divided in two parts, 72645 and 126, that added together give a triangular number (72771 = T₃₈₁).

The spelling of 72645126 in words is "seventy-two million, six hundred forty-five thousand, one hundred twenty-six".