72257671 has 4 divisors (see below), whose sum is σ = 72276232. Its totient is φ = 72239112.

The previous prime is 72257657. The next prime is 72257677. The reversal of 72257671 is 17675227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17675227 = 743 ⋅23789.

It is a cyclic number.

It is not a de Polignac number, because 72257671 - 2⁵ = 72257639 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 72257671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72257677) 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, 945 + ... + 12058.

It is an arithmetic number, because the mean of its divisors is an integer number (18069058).

Almost surely, 2^72257671 is an apocalyptic number.

72257671 is a deficient number, since it is larger than the sum of its proper divisors (18561).

72257671 is a wasteful number, since it uses less digits than its factorization.

72257671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18560.

The product of its digits is 41160, while the sum is 37.

The square root of 72257671 is about 8500.4512233175. The cubic root of 72257671 is about 416.5124490254.

The spelling of 72257671 in words is "seventy-two million, two hundred fifty-seven thousand, six hundred seventy-one".