654885 has 72 divisors (see below), whose sum is σ = 1493856. Its totient is φ = 272160.

The previous prime is 654877. The next prime is 654889. The reversal of 654885 is 588456.

654885 = T₁₂₆ + T₁₂₇ + ... + T₁₈₀.

It is a happy number.

It is not a de Polignac number, because 654885 - 2³ = 654877 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654889) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 59530 + ... + 59540.

It is an arithmetic number, because the mean of its divisors is an integer number (20748).

2⁶⁵⁴⁸⁸⁵ is an apocalyptic number.

654885 is the 405-th decagonal number.

It is an amenable number.

654885 is an abundant number, since it is smaller than the sum of its proper divisors (838971).

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

654885 is a wasteful number, since it uses less digits than its factorization.

654885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45 (or 26 counting only the distinct ones).

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

The square root of 654885 is about 809.2496524559. The cubic root of 654885 is about 86.8403731712.

It can be divided in two parts, 65 and 4885, that added together give a triangular number (4950 = T₉₉).

The spelling of 654885 in words is "six hundred fifty-four thousand, eight hundred eighty-five".