1643132 has 6 divisors (see below), whose sum is σ = 2875488. Its totient is φ = 821564.

The previous prime is 1643129. The next prime is 1643137. The reversal of 1643132 is 2313461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1643137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205388 + ... + 205395.

It is an arithmetic number, because the mean of its divisors is an integer number (479248).

2^1643132 is an apocalyptic number.

It is an amenable number.

1643132 is a deficient number, since it is larger than the sum of its proper divisors (1232356).

1643132 is a wasteful number, since it uses less digits than its factorization.

1643132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410787 (or 410785 counting only the distinct ones).

The product of its digits is 432, while the sum is 20.

The square root of 1643132 is about 1281.8471047672. The cubic root of 1643132 is about 118.0023938995.

Adding to 1643132 its reverse (2313461), we get a palindrome (3956593).

The spelling of 1643132 in words is "one million, six hundred forty-three thousand, one hundred thirty-two".