121957500 has 240 divisors, whose sum is σ = 428262912. Its totient is φ = 26400000.

The previous prime is 121957469. The next prime is 121957519. The reversal of 121957500 is 5759121.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1207450 + ... + 1207550.

Almost surely, 2^121957500 is an apocalyptic number.

121957500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121957500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214131456).

121957500 is an abundant number, since it is smaller than the sum of its proper divisors (306305412).

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

121957500 is a wasteful number, since it uses less digits than its factorization.

121957500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 30.

The square root of 121957500 is about 11043.4369650032. The cubic root of 121957500 is about 495.9099678331.

The spelling of 121957500 in words is "one hundred twenty-one million, nine hundred fifty-seven thousand, five hundred".