643124 has 6 divisors (see below), whose sum is σ = 1125474. Its totient is φ = 321560.

The previous prime is 643121. The next prime is 643129. The reversal of 643124 is 421346.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 532900 + 110224 = 730^2 + 332^2 .

It is a junction number, because it is equal to n+sod(n) for n = 643096 and 643105.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 643124.

It is not an unprimeable number, because it can be changed into a prime (643121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80387 + ... + 80394.

It is an arithmetic number, because the mean of its divisors is an integer number (187579).

2⁶⁴³¹²⁴ is an apocalyptic number.

It is an amenable number.

643124 is a deficient number, since it is larger than the sum of its proper divisors (482350).

643124 is a wasteful number, since it uses less digits than its factorization.

643124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160785 (or 160783 counting only the distinct ones).

The product of its digits is 576, while the sum is 20.

The square root of 643124 is about 801.9501231373. The cubic root of 643124 is about 86.3173778630.

It can be divided in two parts, 643 and 124, that added together give a palindrome (767).

The spelling of 643124 in words is "six hundred forty-three thousand, one hundred twenty-four".