1681332 has 12 divisors (see below), whose sum is σ = 3923136. Its totient is φ = 560440.

The previous prime is 1681321. The next prime is 1681349. The reversal of 1681332 is 2331861.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70044 + ... + 70067.

It is an arithmetic number, because the mean of its divisors is an integer number (326928).

2^1681332 is an apocalyptic number.

1681332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1681332 is an abundant number, since it is smaller than the sum of its proper divisors (2241804).

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

1681332 is a wasteful number, since it uses less digits than its factorization.

1681332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140118 (or 140116 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

The square root of 1681332 is about 1296.6618680288. The cubic root of 1681332 is about 118.9098486288.

The spelling of 1681332 in words is "one million, six hundred eighty-one thousand, three hundred thirty-two".