120561491 has 2 divisors, whose sum is σ = 120561492. Its totient is φ = 120561490.

The previous prime is 120561487. The next prime is 120561557. The reversal of 120561491 is 194165021.

It is a weak prime.

It is an emirp because it is prime and its reverse (194165021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120561491 - 2² = 120561487 is a prime.

It is a super-2 number, since 2×120561491² = 29070146224286162, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (120581491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60280745 + 60280746.

It is an arithmetic number, because the mean of its divisors is an integer number (60280746).

Almost surely, 2^120561491 is an apocalyptic number.

120561491 is a deficient number, since it is larger than the sum of its proper divisors (1).

120561491 is an equidigital number, since it uses as much as digits as its factorization.

120561491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 120561491 is about 10980.0496811262. The cubic root of 120561491 is about 494.0105269110.

The spelling of 120561491 in words is "one hundred twenty million, five hundred sixty-one thousand, four hundred ninety-one".