121493790 has 128 divisors (see below), whose sum is σ = 372211200. Its totient is φ = 27889920.

The previous prime is 121493759. The next prime is 121493807. The reversal of 121493790 is 97394121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 55354 + ... + 57506.

It is an arithmetic number, because the mean of its divisors is an integer number (2907900).

Almost surely, 2^121493790 is an apocalyptic number.

121493790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121493790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186105600).

121493790 is an abundant number, since it is smaller than the sum of its proper divisors (250717410).

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

121493790 is a wasteful number, since it uses less digits than its factorization.

121493790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2199 (or 2193 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 121493790 is about 11022.4221476044. The cubic root of 121493790 is about 495.2806489319.

The spelling of 121493790 in words is "one hundred twenty-one million, four hundred ninety-three thousand, seven hundred ninety".