122205657 has 24 divisors (see below), whose sum is σ = 191443392. Its totient is φ = 69132000.

The previous prime is 122205649. The next prime is 122205661. The reversal of 122205657 is 756502221.

It is not a de Polignac number, because 122205657 - 2³ = 122205649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122205607) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10732 + ... + 18962.

It is an arithmetic number, because the mean of its divisors is an integer number (7976808).

Almost surely, 2^122205657 is an apocalyptic number.

It is an amenable number.

122205657 is a deficient number, since it is larger than the sum of its proper divisors (69237735).

122205657 is a wasteful number, since it uses less digits than its factorization.

122205657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8349 (or 8342 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 122205657 is about 11054.6667521007. Note that the first 3 decimals coincide. The cubic root of 122205657 is about 496.2460962794.

Adding to 122205657 its reverse (756502221), we get a palindrome (878707878).

The spelling of 122205657 in words is "one hundred twenty-two million, two hundred five thousand, six hundred fifty-seven".