120439945 has 8 divisors (see below), whose sum is σ = 146977920. Its totient is φ = 94718640.

The previous prime is 120439931. The next prime is 120439981. The reversal of 120439945 is 549934021.

120439945 = T₁₉₉₁ + T₁₉₉₂ + ... + T₂₀₄₉.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 120439945 - 2¹⁷ = 120308873 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 203841 + ... + 204430.

It is an arithmetic number, because the mean of its divisors is an integer number (18372240).

Almost surely, 2^120439945 is an apocalyptic number.

It is an amenable number.

120439945 is a deficient number, since it is larger than the sum of its proper divisors (26537975).

120439945 is an equidigital number, since it uses as much as digits as its factorization.

120439945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408335.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 120439945 is about 10974.5134288496. The cubic root of 120439945 is about 493.8444562120.

The spelling of 120439945 in words is "one hundred twenty million, four hundred thirty-nine thousand, nine hundred forty-five".