120231405 has 64 divisors (see below), whose sum is σ = 249569280. Its totient is φ = 53773632.

The previous prime is 120231359. The next prime is 120231409. The reversal of 120231405 is 504132021.

It is not a de Polignac number, because 120231405 - 2⁶ = 120231341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120231409) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 43062 + ... + 45768.

It is an arithmetic number, because the mean of its divisors is an integer number (3899520).

Almost surely, 2^120231405 is an apocalyptic number.

120231405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

120231405 is an abundant number, since it is smaller than the sum of its proper divisors (129337875).

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

120231405 is a wasteful number, since it uses less digits than its factorization.

120231405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2775 (or 2769 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 120231405 is about 10965.0082079313. The cubic root of 120231405 is about 493.5592633996.

Adding to 120231405 its reverse (504132021), we get a palindrome (624363426).

The spelling of 120231405 in words is "one hundred twenty million, two hundred thirty-one thousand, four hundred five".