121490655 has 96 divisors (see below), whose sum is σ = 243102720. Its totient is φ = 51321600.

The previous prime is 121490597. The next prime is 121490659. The reversal of 121490655 is 556094121.

It is not a de Polignac number, because 121490655 - 2⁶ = 121490591 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121490659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 448170 + ... + 448440.

It is an arithmetic number, because the mean of its divisors is an integer number (2532320).

Almost surely, 2^121490655 is an apocalyptic number.

121490655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121490655 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

121490655 is a wasteful number, since it uses less digits than its factorization.

121490655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 121490655 is about 11022.2799365648. The cubic root of 121490655 is about 495.2763888563.

The spelling of 121490655 in words is "one hundred twenty-one million, four hundred ninety thousand, six hundred fifty-five".