643074 has 16 divisors (see below), whose sum is σ = 1354080. Its totient is φ = 203040.

The previous prime is 643073. The next prime is 643081. The reversal of 643074 is 470346.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 643074.

It is not an unprimeable number, because it can be changed into a prime (643073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2707 + ... + 2934.

It is an arithmetic number, because the mean of its divisors is an integer number (84630).

2⁶⁴³⁰⁷⁴ is an apocalyptic number.

643074 is an abundant number, since it is smaller than the sum of its proper divisors (711006).

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

643074 is a wasteful number, since it uses less digits than its factorization.

643074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5665.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 643074 is about 801.9189485229. The cubic root of 643074 is about 86.3151408757.

The spelling of 643074 in words is "six hundred forty-three thousand, seventy-four".