72275123 has 4 divisors (see below), whose sum is σ = 72294768. Its totient is φ = 72255480.

The previous prime is 72275113. The next prime is 72275141. The reversal of 72275123 is 32157227.

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

It is a cyclic number.

It is not a de Polignac number, because 72275123 - 2¹⁶ = 72209587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72275113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2468 + ... + 12273.

It is an arithmetic number, because the mean of its divisors is an integer number (18073692).

Almost surely, 2^72275123 is an apocalyptic number.

72275123 is a deficient number, since it is larger than the sum of its proper divisors (19645).

72275123 is a wasteful number, since it uses less digits than its factorization.

72275123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19644.

The product of its digits is 5880, while the sum is 29.

The square root of 72275123 is about 8501.4776950834. The cubic root of 72275123 is about 416.5459789839.

The spelling of 72275123 in words is "seventy-two million, two hundred seventy-five thousand, one hundred twenty-three".