120747981 has 4 divisors (see below), whose sum is σ = 160997312. Its totient is φ = 80498652.

The previous prime is 120747973. The next prime is 120748031. The reversal of 120747981 is 189747021.

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 120747981 - 2³ = 120747973 is a prime.

It is a super-2 number, since 2×120747981² = 29160149831152722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120747931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20124661 + ... + 20124666.

It is an arithmetic number, because the mean of its divisors is an integer number (40249328).

Almost surely, 2^120747981 is an apocalyptic number.

It is an amenable number.

120747981 is a deficient number, since it is larger than the sum of its proper divisors (40249331).

120747981 is an equidigital number, since it uses as much as digits as its factorization.

120747981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40249330.

The product of its (nonzero) digits is 28224, while the sum is 39.

The square root of 120747981 is about 10988.5386198530. The cubic root of 120747981 is about 494.2651150070.

The spelling of 120747981 in words is "one hundred twenty million, seven hundred forty-seven thousand, nine hundred eighty-one".