120405623 has 8 divisors (see below), whose sum is σ = 129801168. Its totient is φ = 111029184.

The previous prime is 120405619. The next prime is 120405629. The reversal of 120405623 is 326504021.

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 120405623 - 2² = 120405619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120405629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10040 + ... + 18482.

It is an arithmetic number, because the mean of its divisors is an integer number (16225146).

Almost surely, 2^120405623 is an apocalyptic number.

120405623 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

120405623 is a deficient number, since it is larger than the sum of its proper divisors (9395545).

120405623 is a wasteful number, since it uses less digits than its factorization.

120405623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9553.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 120405623 is about 10972.9496034567. The cubic root of 120405623 is about 493.7975411575.

Adding to 120405623 its reverse (326504021), we get a palindrome (446909644).

The spelling of 120405623 in words is "one hundred twenty million, four hundred five thousand, six hundred twenty-three".