121786875 has 80 divisors (see below), whose sum is σ = 257917440. Its totient is φ = 55620000.

The previous prime is 121786871. The next prime is 121786897. The reversal of 121786875 is 578687121.

It is a happy number.

It is not a de Polignac number, because 121786875 - 2² = 121786871 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 121786875.

It is not an unprimeable number, because it can be changed into a prime (121786871) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 117610 + ... + 118640.

It is an arithmetic number, because the mean of its divisors is an integer number (3223968).

Almost surely, 2^121786875 is an apocalyptic number.

121786875 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121786875 is an abundant number, since it is smaller than the sum of its proper divisors (136130565).

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

121786875 is an equidigital number, since it uses as much as digits as its factorization.

121786875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067 (or 1046 counting only the distinct ones).

The product of its digits is 188160, while the sum is 45.

The square root of 121786875 is about 11035.7090846035. The cubic root of 121786875 is about 495.6785917962.

The spelling of 121786875 in words is "one hundred twenty-one million, seven hundred eighty-six thousand, eight hundred seventy-five".