120981505 has 4 divisors (see below), whose sum is σ = 145177812. Its totient is φ = 96785200.

The previous prime is 120981491. The next prime is 120981517. The reversal of 120981505 is 505189021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505189021 = 15923 ⋅31727.

It can be written as a sum of positive squares in 2 ways, for example, as 37368769 + 83612736 = 6113^2 + 9144^2 .

It is not a de Polignac number, because 120981505 - 2⁵ = 120981473 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12098146 + ... + 12098155.

It is an arithmetic number, because the mean of its divisors is an integer number (36294453).

Almost surely, 2^120981505 is an apocalyptic number.

It is an amenable number.

120981505 is a deficient number, since it is larger than the sum of its proper divisors (24196307).

120981505 is an equidigital number, since it uses as much as digits as its factorization.

120981505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24196306.

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 120981505 is about 10999.1592860545. The cubic root of 120981505 is about 494.5835425209.

The spelling of 120981505 in words is "one hundred twenty million, nine hundred eighty-one thousand, five hundred five".