121407406 has 8 divisors (see below), whose sum is σ = 182174040.
Its totient is φ = 60682728.
The previous prime is 121407401. The next prime is 121407463. The reversal of 121407406 is 604704121.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (121407401) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1821 + ... + 15688.
It is an arithmetic number, because the mean of its divisors is an integer number (22771755).
Almost surely, 2121407406 is an apocalyptic number.
121407406 is a deficient number, since it is larger than the sum of its proper divisors (60766634).
121407406 is a wasteful number, since it uses less digits than its factorization.
121407406 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 20978.
The product of its (nonzero) digits is 1344, while the sum is 25.
The square root of 121407406 is about 11018.5028928616.
The cubic root of 121407406 is about 495.1632369838.
The spelling of 121407406 in words is "one hundred twenty-one million, four hundred seven thousand, four hundred six".