121505750 has 16 divisors (see below), whose sum is σ = 227459232. Its totient is φ = 48602200.

The previous prime is 121505723. The next prime is 121505753. The reversal of 121505750 is 57505121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121505753) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242762 + ... + 243261.

It is an arithmetic number, because the mean of its divisors is an integer number (14216202).

Almost surely, 2^121505750 is an apocalyptic number.

121505750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121505750 is a deficient number, since it is larger than the sum of its proper divisors (105953482).

121505750 is an equidigital number, since it uses as much as digits as its factorization.

121505750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486040 (or 486030 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 26.

The square root of 121505750 is about 11022.9646647352. The cubic root of 121505750 is about 495.2969004133.

The spelling of 121505750 in words is "one hundred twenty-one million, five hundred five thousand, seven hundred fifty".