122540321 has 4 divisors (see below), whose sum is σ = 122833200. Its totient is φ = 122247444.

The previous prime is 122540317. The next prime is 122540323. The reversal of 122540321 is 123045221.

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, and also an emirpimes, since its reverse is a distinct semiprime: 123045221 = 13 ⋅9465017.

It is a cyclic number.

It is not a de Polignac number, because 122540321 - 2² = 122540317 is a prime.

It is a super-2 number, since 2×122540321² = 30032260541566082, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 122540293 and 122540302.

It is not an unprimeable number, because it can be changed into a prime (122540323) 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, 145811 + ... + 146648.

It is an arithmetic number, because the mean of its divisors is an integer number (30708300).

Almost surely, 2^122540321 is an apocalyptic number.

It is an amenable number.

122540321 is a deficient number, since it is larger than the sum of its proper divisors (292879).

122540321 is an equidigital number, since it uses as much as digits as its factorization.

122540321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292878.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 122540321 is about 11069.7931778331. The cubic root of 122540321 is about 496.6986785266.

Adding to 122540321 its reverse (123045221), we get a palindrome (245585542).

The spelling of 122540321 in words is "one hundred twenty-two million, five hundred forty thousand, three hundred twenty-one".