120408405 has 16 divisors (see below), whose sum is σ = 207473280. Its totient is φ = 59277888.

The previous prime is 120408401. The next prime is 120408413. The reversal of 120408405 is 504804021.

It is not a de Polignac number, because 120408405 - 2² = 120408401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120408401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 308545 + ... + 308934.

It is an arithmetic number, because the mean of its divisors is an integer number (12967080).

Almost surely, 2^120408405 is an apocalyptic number.

120408405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

120408405 is a deficient number, since it is larger than the sum of its proper divisors (87064875).

120408405 is a wasteful number, since it uses less digits than its factorization.

120408405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617500.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 120408405 is about 10973.0763690043. The cubic root of 120408405 is about 493.8013442307.

The spelling of 120408405 in words is "one hundred twenty million, four hundred eight thousand, four hundred five".