122238561 has 4 divisors (see below), whose sum is σ = 162984752. Its totient is φ = 81492372.

The previous prime is 122238539. The next prime is 122238593. The reversal of 122238561 is 165832221.

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 not a de Polignac number, because 122238561 - 2⁷ = 122238433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122238521) 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, 20373091 + ... + 20373096.

It is an arithmetic number, because the mean of its divisors is an integer number (40746188).

Almost surely, 2^122238561 is an apocalyptic number.

It is an amenable number.

122238561 is a deficient number, since it is larger than the sum of its proper divisors (40746191).

122238561 is an equidigital number, since it uses as much as digits as its factorization.

122238561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40746190.

The product of its digits is 5760, while the sum is 30.

The square root of 122238561 is about 11056.1548921856. The cubic root of 122238561 is about 496.2906305415.

The spelling of 122238561 in words is "one hundred twenty-two million, two hundred thirty-eight thousand, five hundred sixty-one".