643148 has 24 divisors (see below), whose sum is σ = 1257984. Its totient is φ = 285200.

The previous prime is 643129. The next prime is 643183. The reversal of 643148 is 841346.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 643148.

It is an unprimeable number.

643148 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1913 + ... + 2223.

It is an arithmetic number, because the mean of its divisors is an integer number (52416).

2⁶⁴³¹⁴⁸ is an apocalyptic number.

It is an amenable number.

643148 is a deficient number, since it is larger than the sum of its proper divisors (614836).

643148 is a wasteful number, since it uses less digits than its factorization.

643148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373 (or 371 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

The square root of 643148 is about 801.9650865219. The cubic root of 643148 is about 86.3184515757.

The spelling of 643148 in words is "six hundred forty-three thousand, one hundred forty-eight".