121297790 has 16 divisors (see below), whose sum is σ = 218469312. Its totient is φ = 48489504.

The previous prime is 121297789. The next prime is 121297811. The reversal of 121297790 is 97792121.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 21992 + ... + 26948.

It is an arithmetic number, because the mean of its divisors is an integer number (13654332).

Almost surely, 2^121297790 is an apocalyptic number.

121297790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121297790 is a deficient number, since it is larger than the sum of its proper divisors (97171522).

121297790 is a wasteful number, since it uses less digits than its factorization.

121297790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7411.

The product of its (nonzero) digits is 15876, while the sum is 38.

The square root of 121297790 is about 11013.5275911036. The cubic root of 121297790 is about 495.0141682167.

The spelling of 121297790 in words is "one hundred twenty-one million, two hundred ninety-seven thousand, seven hundred ninety".