121404390 has 32 divisors (see below), whose sum is σ = 291690720. Its totient is φ = 32338944.

The previous prime is 121404383. The next prime is 121404449. The reversal of 121404390 is 93404121.

It is a super-2 number, since 2×121404390² = 29478051822544200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121404390.

It is a congruent 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, 36726 + ... + 39894.

It is an arithmetic number, because the mean of its divisors is an integer number (9115335).

Almost surely, 2^121404390 is an apocalyptic number.

121404390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121404390 is an abundant number, since it is smaller than the sum of its proper divisors (170286330).

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

121404390 is a wasteful number, since it uses less digits than its factorization.

121404390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4456.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 121404390 is about 11018.3660313134. The cubic root of 121404390 is about 495.1591366719.

The spelling of 121404390 in words is "one hundred twenty-one million, four hundred four thousand, three hundred ninety".