1145033161 has 4 divisors (see below), whose sum is σ = 1145270212. Its totient is φ = 1144796112.

The previous prime is 1145033137. The next prime is 1145033203. The reversal of 1145033161 is 1613305411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1613305411 = 1693 ⋅952927.

It can be written as a sum of positive squares in 2 ways, for example, as 438483600 + 706549561 = 20940^2 + 26581^2 .

It is a cyclic number.

It is not a de Polignac number, because 1145033161 - 2⁷ = 1145033033 is a prime.

It is a super-2 number, since 2×1145033161² = 2622201879579303842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145031161) 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, 111126 + ... + 120991.

It is an arithmetic number, because the mean of its divisors is an integer number (286317553).

Almost surely, 2^1145033161 is an apocalyptic number.

It is an amenable number.

1145033161 is a deficient number, since it is larger than the sum of its proper divisors (237051).

1145033161 is an equidigital number, since it uses as much as digits as its factorization.

1145033161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237050.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1145033161 is about 33838.3386264751. The cubic root of 1145033161 is about 1046.1790560862.

Adding to 1145033161 its reverse (1613305411), we get a palindrome (2758338572).

The spelling of 1145033161 in words is "one billion, one hundred forty-five million, thirty-three thousand, one hundred sixty-one".