868554 has 24 divisors (see below), whose sum is σ = 1910532. Its totient is φ = 285120.

The previous prime is 868537. The next prime is 868559. The reversal of 868554 is 455868.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 837225 + 31329 = 915^2 + 177^2 .

It is not an unprimeable number, because it can be changed into a prime (868559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 984 + ... + 1644.

2⁸⁶⁸⁵⁵⁴ is an apocalyptic number.

868554 is an abundant number, since it is smaller than the sum of its proper divisors (1041978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

868554 is a wasteful number, since it uses less digits than its factorization.

868554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742 (or 739 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 868554 is about 931.9624455953. The cubic root of 868554 is about 95.4111084991.

Subtracting from 868554 its reverse (455868), we obtain a triangular number (412686 = T₉₀₈).

The spelling of 868554 in words is "eight hundred sixty-eight thousand, five hundred fifty-four".