120405415 has 16 divisors (see below), whose sum is σ = 156407328. Its totient is φ = 88454016.

The previous prime is 120405403. The next prime is 120405427. The reversal of 120405415 is 514504021.

It is an interprime number because it is at equal distance from previous prime (120405403) and next prime (120405427).

It is a cyclic number.

It is not a de Polignac number, because 120405415 - 2²¹ = 118308263 is a prime.

It is a super-2 number, since 2×120405415² = 28994927922644450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8104 + ... + 17506.

It is an arithmetic number, because the mean of its divisors is an integer number (9775458).

Almost surely, 2^120405415 is an apocalyptic number.

120405415 is a deficient number, since it is larger than the sum of its proper divisors (36001913).

120405415 is a wasteful number, since it uses less digits than its factorization.

120405415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9618.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 120405415 is about 10972.9401255999. The cubic root of 120405415 is about 493.7972568132.

Adding to 120405415 its reverse (514504021), we get a palindrome (634909436).

The spelling of 120405415 in words is "one hundred twenty million, four hundred five thousand, four hundred fifteen".