121605250 has 128 divisors (see below), whose sum is σ = 271724544. Its totient is φ = 40320000.

The previous prime is 121605229. The next prime is 121605251. The reversal of 121605250 is 52506121.

It is not an unprimeable number, because it can be changed into a prime (121605251) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1712715 + ... + 1712785.

It is an arithmetic number, because the mean of its divisors is an integer number (2122848).

Almost surely, 2^121605250 is an apocalyptic number.

121605250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121605250 is an abundant number, since it is smaller than the sum of its proper divisors (150119294).

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

121605250 is a wasteful number, since it uses less digits than its factorization.

121605250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 121605250 is about 11027.4770459974. The cubic root of 121605250 is about 495.4320616313.

The spelling of 121605250 in words is "one hundred twenty-one million, six hundred five thousand, two hundred fifty".