121791492 has 48 divisors (see below), whose sum is σ = 317446080. Its totient is φ = 40379904.

The previous prime is 121791491. The next prime is 121791497. The reversal of 121791492 is 294197121.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (121791491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17923 + ... + 23765.

It is an arithmetic number, because the mean of its divisors is an integer number (6613460).

Almost surely, 2^121791492 is an apocalyptic number.

121791492 is a gapful number since it is divisible by the number (12) 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 121791492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158723040).

121791492 is an abundant number, since it is smaller than the sum of its proper divisors (195654588).

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

121791492 is a wasteful number, since it uses less digits than its factorization.

121791492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6049 (or 6041 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 121791492 is about 11035.9182671856. The cubic root of 121791492 is about 495.6848555230.

The spelling of 121791492 in words is "one hundred twenty-one million, seven hundred ninety-one thousand, four hundred ninety-two".