1681432 has 16 divisors (see below), whose sum is σ = 3200760. Its totient is φ = 827904.

The previous prime is 1681423. The next prime is 1681469. The reversal of 1681432 is 2341861.

It is a junction number, because it is equal to n+sod(n) for n = 1681397 and 1681406.

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, 1033 + ... + 2104.

2^1681432 is an apocalyptic number.

It is an amenable number.

1681432 is a deficient number, since it is larger than the sum of its proper divisors (1519328).

1681432 is a wasteful number, since it uses less digits than its factorization.

1681432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3210 (or 3206 counting only the distinct ones).

The product of its digits is 1152, while the sum is 25.

The square root of 1681432 is about 1296.7004280095. The cubic root of 1681432 is about 118.9122060353.

It can be divided in two parts, 168 and 1432, that added together give a square (1600 = 40²).

The spelling of 1681432 in words is "one million, six hundred eighty-one thousand, four hundred thirty-two".