121398340 has 24 divisors (see below), whose sum is σ = 291356352. Its totient is φ = 41622240.

The previous prime is 121398323. The next prime is 121398401. The reversal of 121398340 is 43893121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433426 + ... + 433705.

It is an arithmetic number, because the mean of its divisors is an integer number (12139848).

Almost surely, 2^121398340 is an apocalyptic number.

121398340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121398340 is an abundant number, since it is smaller than the sum of its proper divisors (169958012).

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

121398340 is a wasteful number, since it uses less digits than its factorization.

121398340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867147 (or 867145 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 121398340 is about 11018.0914862784. The cubic root of 121398340 is about 495.1509113721.

The spelling of 121398340 in words is "one hundred twenty-one million, three hundred ninety-eight thousand, three hundred forty".