120405601 has 4 divisors (see below), whose sum is σ = 121284612. Its totient is φ = 119526592.

The previous prime is 120405599. The next prime is 120405613. The reversal of 120405601 is 106504021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 93624976 + 26780625 = 9676^2 + 5175^2 .

It is a cyclic number.

It is not a de Polignac number, because 120405601 - 2¹ = 120405599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120405631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 439300 + ... + 439573.

It is an arithmetic number, because the mean of its divisors is an integer number (30321153).

Almost surely, 2^120405601 is an apocalyptic number.

It is an amenable number.

120405601 is a deficient number, since it is larger than the sum of its proper divisors (879011).

120405601 is an equidigital number, since it uses as much as digits as its factorization.

120405601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879010.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 120405601 is about 10972.9486009914. The cubic root of 120405601 is about 493.7975110826.

Adding to 120405601 its reverse (106504021), we get a palindrome (226909622).

The spelling of 120405601 in words is "one hundred twenty million, four hundred five thousand, six hundred one".