681412 has 6 divisors (see below), whose sum is σ = 1192478. Its totient is φ = 340704.

The previous prime is 681409. The next prime is 681419. The reversal of 681412 is 214186.

It can be written as a sum of positive squares in only one way, i.e., 568516 + 112896 = 754^2 + 336^2 .

It is not an unprimeable number, because it can be changed into a prime (681419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85173 + ... + 85180.

2⁶⁸¹⁴¹² is an apocalyptic number.

It is an amenable number.

681412 is a deficient number, since it is larger than the sum of its proper divisors (511066).

681412 is a wasteful number, since it uses less digits than its factorization.

681412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170357 (or 170355 counting only the distinct ones).

The product of its digits is 384, while the sum is 22.

The square root of 681412 is about 825.4768318978. The cubic root of 681412 is about 87.9974172796.

Adding to 681412 its reverse (214186), we get a palindrome (895598).

It can be divided in two parts, 6 and 81412, that added together give a palindrome (81418).

The spelling of 681412 in words is "six hundred eighty-one thousand, four hundred twelve".