651224 has 32 divisors (see below), whose sum is σ = 1447200. Its totient is φ = 268800.

The previous prime is 651223. The next prime is 651239. The reversal of 651224 is 422156.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 651196 and 651205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651221) 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 7 ways as a sum of consecutive naturals, for example, 1424 + ... + 1824.

It is an arithmetic number, because the mean of its divisors is an integer number (45225).

2⁶⁵¹²²⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 651224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (723600).

651224 is an abundant number, since it is smaller than the sum of its proper divisors (795976).

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

651224 is a wasteful number, since it uses less digits than its factorization.

651224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443 (or 439 counting only the distinct ones).

The product of its digits is 480, while the sum is 20.

The square root of 651224 is about 806.9845103842. The cubic root of 651224 is about 86.6782496024.

The spelling of 651224 in words is "six hundred fifty-one thousand, two hundred twenty-four".