845131 has 8 divisors (see below), whose sum is σ = 973280. Its totient is φ = 718848.

The previous prime is 845129. The next prime is 845137. The reversal of 845131 is 131548.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 11-Lehmer number, since φ(845131) divides (845131-1)¹¹.

It is a cyclic number.

It is not a de Polignac number, because 845131 - 2¹ = 845129 is a prime.

It is a super-2 number, since 2×845131² = 1428492814322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (845137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 715 + ... + 1483.

It is an arithmetic number, because the mean of its divisors is an integer number (121660).

2⁸⁴⁵¹³¹ is an apocalyptic number.

845131 is a deficient number, since it is larger than the sum of its proper divisors (128149).

845131 is a wasteful number, since it uses less digits than its factorization.

845131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933.

The product of its digits is 480, while the sum is 22.

The square root of 845131 is about 919.3100673875. The cubic root of 845131 is about 94.5456047436.

Adding to 845131 its reverse (131548), we get a palindrome (976679).

The spelling of 845131 in words is "eight hundred forty-five thousand, one hundred thirty-one".