161042303 has 4 divisors (see below), whose sum is σ = 166237248. Its totient is φ = 155847360.

The previous prime is 161042281. The next prime is 161042359. The reversal of 161042303 is 303240161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 303240161 = 7 ⋅43320023.

It is a cyclic number.

It is not a de Polignac number, because 161042303 - 2²⁴ = 144265087 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 (161042393) 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, 2597426 + ... + 2597487.

It is an arithmetic number, because the mean of its divisors is an integer number (41559312).

Almost surely, 2^161042303 is an apocalyptic number.

161042303 is a deficient number, since it is larger than the sum of its proper divisors (5194945).

161042303 is an equidigital number, since it uses as much as digits as its factorization.

161042303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5194944.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 161042303 is about 12690.2444026898. The cubic root of 161042303 is about 544.0598250509.

Adding to 161042303 its reverse (303240161), we get a palindrome (464282464).

The spelling of 161042303 in words is "one hundred sixty-one million, forty-two thousand, three hundred three".