161260559 has 2 divisors, whose sum is σ = 161260560. Its totient is φ = 161260558.

The previous prime is 161260553. The next prime is 161260591. The reversal of 161260559 is 955062161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161260559 - 2¹² = 161256463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161260553) 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, 80630279 + 80630280.

It is an arithmetic number, because the mean of its divisors is an integer number (80630280).

Almost surely, 2^161260559 is an apocalyptic number.

161260559 is a deficient number, since it is larger than the sum of its proper divisors (1).

161260559 is an equidigital number, since it uses as much as digits as its factorization.

161260559 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 161260559 is about 12698.8408526133. The cubic root of 161260559 is about 544.3054969763.

The spelling of 161260559 in words is "one hundred sixty-one million, two hundred sixty thousand, five hundred fifty-nine".