120400105 has 12 divisors (see below), whose sum is σ = 168069060. Its totient is φ = 82559904.

The previous prime is 120400081. The next prime is 120400117. The reversal of 120400105 is 501004021.

It can be written as a sum of positive squares in 2 ways, for example, as 86806489 + 33593616 = 9317^2 + 5796^2 .

It is not a de Polignac number, because 120400105 - 2⁵ = 120400073 is a prime.

It is a super-2 number, since 2×120400105² = 28992370568022050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 245470 + ... + 245959.

It is an arithmetic number, because the mean of its divisors is an integer number (14005755).

Almost surely, 2^120400105 is an apocalyptic number.

It is an amenable number.

120400105 is a deficient number, since it is larger than the sum of its proper divisors (47668955).

120400105 is an equidigital number, since it uses as much as digits as its factorization.

120400105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491448 (or 491441 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 120400105 is about 10972.6981640798. The cubic root of 120400105 is about 493.7899977212.

Adding to 120400105 its reverse (501004021), we get a palindrome (621404126).

The spelling of 120400105 in words is "one hundred twenty million, four hundred thousand, one hundred five".