122212645 has 4 divisors (see below), whose sum is σ = 146655180. Its totient is φ = 97770112.

The previous prime is 122212637. The next prime is 122212667. The reversal of 122212645 is 546212221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32512804 + 89699841 = 5702^2 + 9471^2 .

It is a cyclic number.

It is not a de Polignac number, because 122212645 - 2³ = 122212637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12221260 + ... + 12221269.

It is an arithmetic number, because the mean of its divisors is an integer number (36663795).

Almost surely, 2^122212645 is an apocalyptic number.

It is an amenable number.

122212645 is a deficient number, since it is larger than the sum of its proper divisors (24442535).

122212645 is an equidigital number, since it uses as much as digits as its factorization.

122212645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24442534.

The product of its digits is 1920, while the sum is 25.

The square root of 122212645 is about 11054.9828131933. The cubic root of 122212645 is about 496.2555549294.

Adding to 122212645 its reverse (546212221), we get a palindrome (668424866).

The spelling of 122212645 in words is "one hundred twenty-two million, two hundred twelve thousand, six hundred forty-five".