845651 has 4 divisors (see below), whose sum is σ = 847704. Its totient is φ = 843600.

The previous prime is 845623. The next prime is 845653. The reversal of 845651 is 156548.

It is a happy number.

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 845651 - 2¹⁴ = 829267 is a prime.

It is a super-2 number, since 2×845651² = 1430251227602, which contains 22 as substring.

It is a pancake number, because a pancake can be divided into 845651 parts by 1300 straight cuts.

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 845651.

It is not an unprimeable number, because it can be changed into a prime (845653) 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, 170 + ... + 1311.

It is an arithmetic number, because the mean of its divisors is an integer number (211926).

2⁸⁴⁵⁶⁵¹ is an apocalyptic number.

845651 is a deficient number, since it is larger than the sum of its proper divisors (2053).

845651 is a wasteful number, since it uses less digits than its factorization.

845651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2052.

The product of its digits is 4800, while the sum is 29.

The square root of 845651 is about 919.5928446873. The cubic root of 845651 is about 94.5649917319.

The spelling of 845651 in words is "eight hundred forty-five thousand, six hundred fifty-one".