161460881 has 2 divisors, whose sum is σ = 161460882. Its totient is φ = 161460880.

The previous prime is 161460857. The next prime is 161460907. The reversal of 161460881 is 188064161.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88529281 + 72931600 = 9409^2 + 8540^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161460881 is a prime.

It is a super-2 number, since 2×161460881² = 52139232186592322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (161460581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80730440 + 80730441.

It is an arithmetic number, because the mean of its divisors is an integer number (80730441).

Almost surely, 2^161460881 is an apocalyptic number.

It is an amenable number.

161460881 is a deficient number, since it is larger than the sum of its proper divisors (1).

161460881 is an equidigital number, since it uses as much as digits as its factorization.

161460881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 161460881 is about 12706.7258174559. The cubic root of 161460881 is about 544.5307871285.

The spelling of 161460881 in words is "one hundred sixty-one million, four hundred sixty thousand, eight hundred eighty-one".