121591250 has 80 divisors (see below), whose sum is σ = 256417920. Its totient is φ = 42840000.

The previous prime is 121591237. The next prime is 121591273. The reversal of 121591250 is 52195121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 508631 + ... + 508869.

It is an arithmetic number, because the mean of its divisors is an integer number (3205224).

Almost surely, 2^121591250 is an apocalyptic number.

121591250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121591250 is an abundant number, since it is smaller than the sum of its proper divisors (134826670).

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

121591250 is a wasteful number, since it uses less digits than its factorization.

121591250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309 (or 294 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 121591250 is about 11026.8422497105. The cubic root of 121591250 is about 495.4130484306.

The spelling of 121591250 in words is "one hundred twenty-one million, five hundred ninety-one thousand, two hundred fifty".