161295287 has 4 divisors (see below), whose sum is σ = 161320896. Its totient is φ = 161269680.

The previous prime is 161295229. The next prime is 161295301. The reversal of 161295287 is 782592161.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 161295287 - 2⁶ = 161295223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161295227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3962 + ... + 18392.

It is an arithmetic number, because the mean of its divisors is an integer number (40330224).

Almost surely, 2^161295287 is an apocalyptic number.

161295287 is a deficient number, since it is larger than the sum of its proper divisors (25609).

161295287 is a wasteful number, since it uses less digits than its factorization.

161295287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25608.

The product of its digits is 60480, while the sum is 41.

The square root of 161295287 is about 12700.2081479006. The cubic root of 161295287 is about 544.3445668408.

The spelling of 161295287 in words is "one hundred sixty-one million, two hundred ninety-five thousand, two hundred eighty-seven".