867561 has 8 divisors (see below), whose sum is σ = 1224864. Its totient is φ = 544320.

The previous prime is 867553. The next prime is 867563. The reversal of 867561 is 165768.

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

It is not a de Polignac number, because 867561 - 2³ = 867553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (867563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8455 + ... + 8556.

It is an arithmetic number, because the mean of its divisors is an integer number (153108).

2⁸⁶⁷⁵⁶¹ is an apocalyptic number.

It is an amenable number.

867561 is a deficient number, since it is larger than the sum of its proper divisors (357303).

867561 is a wasteful number, since it uses less digits than its factorization.

867561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17031.

The product of its digits is 10080, while the sum is 33.

The square root of 867561 is about 931.4295464500. The cubic root of 867561 is about 95.3747341114.

The spelling of 867561 in words is "eight hundred sixty-seven thousand, five hundred sixty-one".