120405923 has 8 divisors (see below), whose sum is σ = 132580800. Its totient is φ = 108435880.

The previous prime is 120405913. The next prime is 120405931. The reversal of 120405923 is 329504021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 120405923 - 2²⁶ = 53297059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120405892 and 120405901.

It is not an unprimeable number, because it can be changed into a prime (120405913) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 49973 + ... + 52326.

It is an arithmetic number, because the mean of its divisors is an integer number (16572600).

Almost surely, 2^120405923 is an apocalyptic number.

120405923 is a deficient number, since it is larger than the sum of its proper divisors (12174877).

120405923 is a wasteful number, since it uses less digits than its factorization.

120405923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102417.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 120405923 is about 10972.9632734280. The cubic root of 120405923 is about 493.7979512689.

Adding to 120405923 its reverse (329504021), we get a palindrome (449909944).

The spelling of 120405923 in words is "one hundred twenty million, four hundred five thousand, nine hundred twenty-three".