121634920 has 32 divisors (see below), whose sum is σ = 298559520. Its totient is φ = 44230720.

The previous prime is 121634897. The next prime is 121635029. The reversal of 121634920 is 29436121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137782 + ... + 138661.

It is an arithmetic number, because the mean of its divisors is an integer number (9329985).

Almost surely, 2^121634920 is an apocalyptic number.

121634920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121634920 is an abundant number, since it is smaller than the sum of its proper divisors (176924600).

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

121634920 is a wasteful number, since it uses less digits than its factorization.

121634920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276465 (or 276461 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 121634920 is about 11028.8222399312. The cubic root of 121634920 is about 495.4723512129.

It can be divided in two parts, 1216 and 34920, that multiplied together give a triangular number (42462720 = T₉₂₁₅).

The spelling of 121634920 in words is "one hundred twenty-one million, six hundred thirty-four thousand, nine hundred twenty".