654249 has 4 divisors (see below), whose sum is σ = 872336. Its totient is φ = 436164.

The previous prime is 654233. The next prime is 654257. The reversal of 654249 is 942456.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 654249 - 2⁴ = 654233 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (654209) 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 3 ways as a sum of consecutive naturals, for example, 109039 + ... + 109044.

It is an arithmetic number, because the mean of its divisors is an integer number (218084).

2⁶⁵⁴²⁴⁹ is an apocalyptic number.

It is an amenable number.

654249 is a deficient number, since it is larger than the sum of its proper divisors (218087).

654249 is a wasteful number, since it uses less digits than its factorization.

654249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218086.

The product of its digits is 8640, while the sum is 30.

The square root of 654249 is about 808.8566003934. The cubic root of 654249 is about 86.8122520170.

It can be divided in two parts, 654 and 249, that added together give a triangular number (903 = T₄₂).

The spelling of 654249 in words is "six hundred fifty-four thousand, two hundred forty-nine".