120320405 has 8 divisors (see below), whose sum is σ = 144464472. Its totient is φ = 96203008.

The previous prime is 120320381. The next prime is 120320437. The reversal of 120320405 is 504023021.

It can be written as a sum of positive squares in 4 ways, for example, as 9102289 + 111218116 = 3017^2 + 10546^2 .

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 120320405 - 2¹² = 120316309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5177 + ... + 16353.

It is an arithmetic number, because the mean of its divisors is an integer number (18058059).

Almost surely, 2^120320405 is an apocalyptic number.

It is an amenable number.

120320405 is a deficient number, since it is larger than the sum of its proper divisors (24144067).

120320405 is a wasteful number, since it uses less digits than its factorization.

120320405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13335.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 120320405 is about 10969.0658216641. The cubic root of 120320405 is about 493.6810173349.

Adding to 120320405 its reverse (504023021), we get a palindrome (624343426).

The spelling of 120320405 in words is "one hundred twenty million, three hundred twenty thousand, four hundred five".