161126287 has 4 divisors (see below), whose sum is σ = 184144336. Its totient is φ = 138108240.

The previous prime is 161126279. The next prime is 161126309. The reversal of 161126287 is 782621161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161126287 - 2³ = 161126279 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 (161121287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11509014 + ... + 11509027.

It is an arithmetic number, because the mean of its divisors is an integer number (46036084).

Almost surely, 2^161126287 is an apocalyptic number.

161126287 is a deficient number, since it is larger than the sum of its proper divisors (23018049).

161126287 is an equidigital number, since it uses as much as digits as its factorization.

161126287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23018048.

The product of its digits is 8064, while the sum is 34.

The square root of 161126287 is about 12693.5529699135. The cubic root of 161126287 is about 544.1543848424.

The spelling of 161126287 in words is "one hundred sixty-one million, one hundred twenty-six thousand, two hundred eighty-seven".