845051 has 4 divisors (see below), whose sum is σ = 865704. Its totient is φ = 824400.

The previous prime is 845041. The next prime is 845069. The reversal of 845051 is 150548.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-845051 is a prime.

It is a super-2 number, since 2×845051² = 1428222385202, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 845051.

It is not an unprimeable number, because it can be changed into a prime (845021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10265 + ... + 10346.

It is an arithmetic number, because the mean of its divisors is an integer number (216426).

2⁸⁴⁵⁰⁵¹ is an apocalyptic number.

845051 is a deficient number, since it is larger than the sum of its proper divisors (20653).

845051 is a wasteful number, since it uses less digits than its factorization.

845051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20652.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 845051 is about 919.2665554669. The cubic root of 845051 is about 94.5426214242.

Adding to 845051 its reverse (150548), we get a palindrome (995599).

The spelling of 845051 in words is "eight hundred forty-five thousand, fifty-one".