121800490 has 32 divisors (see below), whose sum is σ = 251097984. Its totient is φ = 41670720.

The previous prime is 121800451. The next prime is 121800521. The reversal of 121800490 is 94008121.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36700 + ... + 39880.

It is an arithmetic number, because the mean of its divisors is an integer number (7846812).

Almost surely, 2^121800490 is an apocalyptic number.

121800490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121800490 is an abundant number, since it is smaller than the sum of its proper divisors (129297494).

121800490 is a wasteful number, since it uses less digits than its factorization.

121800490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3742.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 121800490 is about 11036.3259284963. The cubic root of 121800490 is about 495.6970623486.

The spelling of 121800490 in words is "one hundred twenty-one million, eight hundred thousand, four hundred ninety".