120243491 has 2 divisors, whose sum is σ = 120243492. Its totient is φ = 120243490.

The previous prime is 120243469. The next prime is 120243503. The reversal of 120243491 is 194342021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 120243491 - 2⁶ = 120243427 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 120243491.

It is not a weakly prime, because it can be changed into another prime (120243691) by changing a digit.

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 as a sum of consecutive naturals, namely, 60121745 + 60121746.

It is an arithmetic number, because the mean of its divisors is an integer number (60121746).

Almost surely, 2^120243491 is an apocalyptic number.

120243491 is a deficient number, since it is larger than the sum of its proper divisors (1).

120243491 is an equidigital number, since it uses as much as digits as its factorization.

120243491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 120243491 is about 10965.5593108605. The cubic root of 120243491 is about 493.5758008353.

The spelling of 120243491 in words is "one hundred twenty million, two hundred forty-three thousand, four hundred ninety-one".