120890005 has 4 divisors (see below), whose sum is σ = 145068012. Its totient is φ = 96712000.

The previous prime is 120889963. The next prime is 120890023. The reversal of 120890005 is 500098021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 500098021 = 9649 ⋅51829.

It can be written as a sum of positive squares in 2 ways, for example, as 14243076 + 106646929 = 3774^2 + 10327^2 .

It is not a de Polignac number, because 120890005 - 2⁹ = 120889493 is a prime.

It is a super-2 number, since 2×120890005² = 29228786617800050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12088996 + ... + 12089005.

It is an arithmetic number, because the mean of its divisors is an integer number (36267003).

Almost surely, 2^120890005 is an apocalyptic number.

It is an amenable number.

120890005 is a deficient number, since it is larger than the sum of its proper divisors (24178007).

120890005 is an equidigital number, since it uses as much as digits as its factorization.

120890005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24178006.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 120890005 is about 10994.9990904956. Note that the first 3 decimals coincide. The cubic root of 120890005 is about 494.4588242626.

The spelling of 120890005 in words is "one hundred twenty million, eight hundred ninety thousand, five".