122886721 has 4 divisors (see below), whose sum is σ = 122948352. Its totient is φ = 122825092.

The previous prime is 122886719. The next prime is 122886773. The reversal of 122886721 is 127688221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 122886721 - 2¹ = 122886719 is a prime.

It is a super-2 number, since 2×122886721² = 30202292396263682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122886121) 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, 27721 + ... + 31846.

It is an arithmetic number, because the mean of its divisors is an integer number (30737088).

Almost surely, 2^122886721 is an apocalyptic number.

It is an amenable number.

122886721 is a deficient number, since it is larger than the sum of its proper divisors (61631).

122886721 is an equidigital number, since it uses as much as digits as its factorization.

122886721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61630.

The product of its digits is 21504, while the sum is 37.

The square root of 122886721 is about 11085.4283182924. The cubic root of 122886721 is about 497.1662648975.

The spelling of 122886721 in words is "one hundred twenty-two million, eight hundred eighty-six thousand, seven hundred twenty-one".