123226721 has 8 divisors (see below), whose sum is σ = 124327488. Its totient is φ = 122130000.

The previous prime is 123226711. The next prime is 123226729. The reversal of 123226721 is 127622321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123226721 - 2¹⁸ = 122964577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123226729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103751 + ... + 104931.

It is an arithmetic number, because the mean of its divisors is an integer number (15540936).

Almost surely, 2^123226721 is an apocalyptic number.

It is an amenable number.

123226721 is a deficient number, since it is larger than the sum of its proper divisors (1100767).

123226721 is a wasteful number, since it uses less digits than its factorization.

123226721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2023.

The product of its digits is 2016, while the sum is 26.

The square root of 123226721 is about 11100.7531726455. The cubic root of 123226721 is about 497.6243585317.

The spelling of 123226721 in words is "one hundred twenty-three million, two hundred twenty-six thousand, seven hundred twenty-one".