72266123 has 4 divisors (see below), whose sum is σ = 72293520. Its totient is φ = 72238728.

The previous prime is 72266113. The next prime is 72266141. The reversal of 72266123 is 32166227.

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 72266123 - 2⁴ = 72266107 is a prime.

It is a super-2 number, since 2×72266123² = 10444785066902258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72266113) 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, 9263 + ... + 15176.

It is an arithmetic number, because the mean of its divisors is an integer number (18073380).

Almost surely, 2^72266123 is an apocalyptic number.

72266123 is a deficient number, since it is larger than the sum of its proper divisors (27397).

72266123 is a wasteful number, since it uses less digits than its factorization.

72266123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27396.

The product of its digits is 6048, while the sum is 29.

The square root of 72266123 is about 8500.9483588597. The cubic root of 72266123 is about 416.5286882515.

The spelling of 72266123 in words is "seventy-two million, two hundred sixty-six thousand, one hundred twenty-three".