120405801 has 4 divisors (see below), whose sum is σ = 160541072. Its totient is φ = 80270532.

The previous prime is 120405797. The next prime is 120405811. The reversal of 120405801 is 108504021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 120405801 - 2² = 120405797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (120405811) 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, 20067631 + ... + 20067636.

It is an arithmetic number, because the mean of its divisors is an integer number (40135268).

Almost surely, 2^120405801 is an apocalyptic number.

It is an amenable number.

120405801 is a deficient number, since it is larger than the sum of its proper divisors (40135271).

120405801 is an equidigital number, since it uses as much as digits as its factorization.

120405801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40135270.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 120405801 is about 10972.9577143084. The cubic root of 120405801 is about 493.7977844903.

Adding to 120405801 its reverse (108504021), we get a palindrome (228909822).

The spelling of 120405801 in words is "one hundred twenty million, four hundred five thousand, eight hundred one".