681532 has 6 divisors (see below), whose sum is σ = 1192688. Its totient is φ = 340764.

The previous prime is 681523. The next prime is 681539. The reversal of 681532 is 235186.

It is a happy number.

681532 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 681497 and 681506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85188 + ... + 85195.

2⁶⁸¹⁵³² is an apocalyptic number.

It is an amenable number.

681532 is a deficient number, since it is larger than the sum of its proper divisors (511156).

681532 is a wasteful number, since it uses less digits than its factorization.

681532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170387 (or 170385 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 681532 is about 825.5495139602. The cubic root of 681532 is about 88.0025825688.

It can be divided in two parts, 68 and 1532, that added together give a square (1600 = 40²).

The spelling of 681532 in words is "six hundred eighty-one thousand, five hundred thirty-two".