867645 has 16 divisors (see below), whose sum is σ = 1542720. Its totient is φ = 462672.

The previous prime is 867641. The next prime is 867653. The reversal of 867645 is 546768.

It is a happy number.

867645 is a `hidden beast` number, since 8 + 6 + 7 + 645 = 666.

867645 is nontrivially palindromic in base 16.

It is not a de Polignac number, because 867645 - 2² = 867641 is a prime.

867645 is an undulating number in base 16.

It is a Curzon number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (867641) 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 15 ways as a sum of consecutive naturals, for example, 3079 + ... + 3348.

It is an arithmetic number, because the mean of its divisors is an integer number (96420).

2⁸⁶⁷⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

867645 is a deficient number, since it is larger than the sum of its proper divisors (675075).

867645 is a wasteful number, since it uses less digits than its factorization.

867645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6441 (or 6435 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 867645 is about 931.4746373359. The cubic root of 867645 is about 95.3778121732.

The spelling of 867645 in words is "eight hundred sixty-seven thousand, six hundred forty-five".