72256741 has 4 divisors (see below), whose sum is σ = 72384300. Its totient is φ = 72129184.

The previous prime is 72256733. The next prime is 72256747. The reversal of 72256741 is 14765227.

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 37564641 + 34692100 = 6129^2 + 5890^2 .

It is a cyclic number.

It is not a de Polignac number, because 72256741 - 2³ = 72256733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72256697 and 72256706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72256747) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 62926 + ... + 64063.

It is an arithmetic number, because the mean of its divisors is an integer number (18096075).

Almost surely, 2^72256741 is an apocalyptic number.

It is an amenable number.

72256741 is a deficient number, since it is larger than the sum of its proper divisors (127559).

72256741 is a wasteful number, since it uses less digits than its factorization.

72256741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127558.

The product of its digits is 23520, while the sum is 34.

The square root of 72256741 is about 8500.3965201630. The cubic root of 72256741 is about 416.5106620952.

The spelling of 72256741 in words is "seventy-two million, two hundred fifty-six thousand, seven hundred forty-one".