121620798 has 32 divisors (see below), whose sum is σ = 291060000. Its totient is φ = 37421568.

The previous prime is 121620797. The next prime is 121620827. The reversal of 121620798 is 897026121.

121620798 is a `hidden beast` number, since 1 + 21 + 620 + 7 + 9 + 8 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121620797) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85923 + ... + 87326.

It is an arithmetic number, because the mean of its divisors is an integer number (9095625).

Almost surely, 2^121620798 is an apocalyptic number.

121620798 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

121620798 is an abundant number, since it is smaller than the sum of its proper divisors (169439202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121620798 is a wasteful number, since it uses less digits than its factorization.

121620798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173273 (or 173267 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 121620798 is about 11028.1819897932. The cubic root of 121620798 is about 495.4531754385.

The spelling of 121620798 in words is "one hundred twenty-one million, six hundred twenty thousand, seven hundred ninety-eight".