867551 has 4 divisors (see below), whose sum is σ = 870504. Its totient is φ = 864600.

The previous prime is 867547. The next prime is 867553. The reversal of 867551 is 155768.

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 867551 - 2² = 867547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (867553) 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, 980 + ... + 1641.

It is an arithmetic number, because the mean of its divisors is an integer number (217626).

2⁸⁶⁷⁵⁵¹ is an apocalyptic number.

867551 is a deficient number, since it is larger than the sum of its proper divisors (2953).

867551 is a wasteful number, since it uses less digits than its factorization.

867551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2952.

The product of its digits is 8400, while the sum is 32.

The square root of 867551 is about 931.4241783420. The cubic root of 867551 is about 95.3743676622.

The spelling of 867551 in words is "eight hundred sixty-seven thousand, five hundred fifty-one".