121688576 has 20 divisors (see below), whose sum is σ = 243140502. Its totient is φ = 60844032.

The previous prime is 121688573. The next prime is 121688587. The reversal of 121688576 is 675886121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 121528576 + 160000 = 11024^2 + 400^2 .

It is not an unprimeable number, because it can be changed into a prime (121688573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 118325 + ... + 119348.

Almost surely, 2^121688576 is an apocalyptic number.

121688576 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121688576 is a deficient number, since it is larger than the sum of its proper divisors (121451926).

121688576 is an frugal number, since it uses more digits than its factorization.

121688576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237691 (or 237675 counting only the distinct ones).

The product of its digits is 161280, while the sum is 44.

The square root of 121688576 is about 11031.2545070812. The cubic root of 121688576 is about 495.5451953061.

The spelling of 121688576 in words is "one hundred twenty-one million, six hundred eighty-eight thousand, five hundred seventy-six".