161105459 has 4 divisors (see below), whose sum is σ = 163836120. Its totient is φ = 158374800.

The previous prime is 161105429. The next prime is 161105467. The reversal of 161105459 is 954501161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 954501161 = 911 ⋅1047751.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161105459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161105429) 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 in 3 ways as a sum of consecutive naturals, for example, 1365242 + ... + 1365359.

It is an arithmetic number, because the mean of its divisors is an integer number (40959030).

Almost surely, 2^161105459 is an apocalyptic number.

161105459 is a deficient number, since it is larger than the sum of its proper divisors (2730661).

161105459 is an equidigital number, since it uses as much as digits as its factorization.

161105459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2730660.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 161105459 is about 12692.7325269226. The cubic root of 161105459 is about 544.1309371147.

The spelling of 161105459 in words is "one hundred sixty-one million, one hundred five thousand, four hundred fifty-nine".