72254117 has 4 divisors (see below), whose sum is σ = 77812140. Its totient is φ = 66696096.

The previous prime is 72254113. The next prime is 72254141. The reversal of 72254117 is 71145227.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4866436 + 67387681 = 2206^2 + 8209^2 .

It is a cyclic number.

It is not a de Polignac number, because 72254117 - 2² = 72254113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72254117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72254113) 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 3 ways as a sum of consecutive naturals, for example, 2778992 + ... + 2779017.

It is an arithmetic number, because the mean of its divisors is an integer number (19453035).

Almost surely, 2^72254117 is an apocalyptic number.

It is an amenable number.

72254117 is a deficient number, since it is larger than the sum of its proper divisors (5558023).

72254117 is a wasteful number, since it uses less digits than its factorization.

72254117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5558022.

The product of its digits is 3920, while the sum is 29.

The square root of 72254117 is about 8500.2421730207. The cubic root of 72254117 is about 416.5056201795.

The spelling of 72254117 in words is "seventy-two million, two hundred fifty-four thousand, one hundred seventeen".