122198656 has 16 divisors (see below), whose sum is σ = 243442890. Its totient is φ = 61099264.

The previous prime is 122198639. The next prime is 122198689. The reversal of 122198656 is 656891221.

It can be written as a sum of positive squares in only one way, i.e., 121352256 + 846400 = 11016^2 + 920^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 477211 + ... + 477466.

Almost surely, 2^122198656 is an apocalyptic number.

122198656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

122198656 is a deficient number, since it is larger than the sum of its proper divisors (121244234).

122198656 is an frugal number, since it uses more digits than its factorization.

122198656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954691 (or 954679 counting only the distinct ones).

The product of its digits is 51840, while the sum is 40.

The square root of 122198656 is about 11054.3500939675. The cubic root of 122198656 is about 496.2366196715.

The spelling of 122198656 in words is "one hundred twenty-two million, one hundred ninety-eight thousand, six hundred fifty-six".