122398658 has 6 divisors (see below), whose sum is σ = 183621459. Its totient is φ = 61191506.

The previous prime is 122398651. The next prime is 122398667. The reversal of 122398658 is 856893221.

It can be written as a sum of positive squares in only one way, i.e., 61199329 + 61199329 = 7823^2 + 7823^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=7823.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (122398651) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 11735 + ... + 19557.

Almost surely, 2^122398658 is an apocalyptic number.

122398658 is a deficient number, since it is larger than the sum of its proper divisors (61222801).

122398658 is an frugal number, since it uses more digits than its factorization.

122398658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15648 (or 7825 counting only the distinct ones).

The product of its digits is 207360, while the sum is 44.

The square root of 122398658 is about 11063.3926984447. The cubic root of 122398658 is about 496.5072015322.

The spelling of 122398658 in words is "one hundred twenty-two million, three hundred ninety-eight thousand, six hundred fifty-eight".