122560721 has 4 divisors (see below), whose sum is σ = 127889472. Its totient is φ = 117231972.

The previous prime is 122560709. The next prime is 122560729. The reversal of 122560721 is 127065221.

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 122560721 - 2⁶ = 122560657 is a prime.

It is a super-2 number, since 2×122560721² = 30042260664079682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122560729) 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, 2664341 + ... + 2664386.

It is an arithmetic number, because the mean of its divisors is an integer number (31972368).

Almost surely, 2^122560721 is an apocalyptic number.

It is an amenable number.

122560721 is a deficient number, since it is larger than the sum of its proper divisors (5328751).

122560721 is an equidigital number, since it uses as much as digits as its factorization.

122560721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5328750.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 122560721 is about 11070.7145659167. The cubic root of 122560721 is about 496.7262397700.

The spelling of 122560721 in words is "one hundred twenty-two million, five hundred sixty thousand, seven hundred twenty-one".