681416 has 16 divisors (see below), whose sum is σ = 1345200. Its totient is φ = 322704.

The previous prime is 681409. The next prime is 681419. The reversal of 681416 is 614186.

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

681416 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2090 + ... + 2393.

It is an arithmetic number, because the mean of its divisors is an integer number (84075).

2⁶⁸¹⁴¹⁶ is an apocalyptic number.

It is an amenable number.

681416 is a deficient number, since it is larger than the sum of its proper divisors (663784).

681416 is a wasteful number, since it uses less digits than its factorization.

681416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4508 (or 4504 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 681416 is about 825.4792547363. The cubic root of 681416 is about 87.9975894657.

The spelling of 681416 in words is "six hundred eighty-one thousand, four hundred sixteen".