121577830 has 32 divisors (see below), whose sum is σ = 240871968. Its totient is φ = 43814400.

The previous prime is 121577791. The next prime is 121577843. The reversal of 121577830 is 38775121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7540 + ... + 17320.

It is an arithmetic number, because the mean of its divisors is an integer number (7527249).

Almost surely, 2^121577830 is an apocalyptic number.

121577830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121577830 is a deficient number, since it is larger than the sum of its proper divisors (119294138).

121577830 is a wasteful number, since it uses less digits than its factorization.

121577830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9912.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 121577830 is about 11026.2337178204. The cubic root of 121577830 is about 495.3948215497.

The spelling of 121577830 in words is "one hundred twenty-one million, five hundred seventy-seven thousand, eight hundred thirty".