120981491 has 2 divisors, whose sum is σ = 120981492. Its totient is φ = 120981490.

The previous prime is 120981481. The next prime is 120981517. The reversal of 120981491 is 194189021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 120981491 - 2²⁶ = 53872627 is a prime.

It is not a weakly prime, because it can be changed into another prime (120981451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60490745 + 60490746.

It is an arithmetic number, because the mean of its divisors is an integer number (60490746).

Almost surely, 2^120981491 is an apocalyptic number.

120981491 is a deficient number, since it is larger than the sum of its proper divisors (1).

120981491 is an equidigital number, since it uses as much as digits as its factorization.

120981491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 120981491 is about 10999.1586496423. The cubic root of 120981491 is about 494.5835234431.

The spelling of 120981491 in words is "one hundred twenty million, nine hundred eighty-one thousand, four hundred ninety-one".