120405501 has 16 divisors (see below), whose sum is σ = 178729920. Its totient is φ = 80112240.

The previous prime is 120405487. The next prime is 120405503. The reversal of 120405501 is 105504021.

120405501 is a `hidden beast` number, since 120 + 40 + 5 + 501 = 666.

It is not a de Polignac number, because 120405501 - 2⁵ = 120405469 is a prime.

It is a super-2 number, since 2×120405501² = 28994969342122002, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120405503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10486 + ... + 18728.

It is an arithmetic number, because the mean of its divisors is an integer number (11170620).

Almost surely, 2^120405501 is an apocalyptic number.

It is an amenable number.

120405501 is a deficient number, since it is larger than the sum of its proper divisors (58324419).

120405501 is an equidigital number, since it uses as much as digits as its factorization.

120405501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8793 (or 8787 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 120405501 is about 10972.9440443301. The cubic root of 120405501 is about 493.7973743787.

Adding to 120405501 its reverse (105504021), we get a palindrome (225909522).

The spelling of 120405501 in words is "one hundred twenty million, four hundred five thousand, five hundred one".