1681395 has 16 divisors (see below), whose sum is σ = 2708640. Its totient is φ = 890624.

The previous prime is 1681363. The next prime is 1681397. The reversal of 1681395 is 5931861.

It is a cyclic number.

It is not a de Polignac number, because 1681395 - 2⁵ = 1681363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1681397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2671 + ... + 3239.

It is an arithmetic number, because the mean of its divisors is an integer number (169290).

2^1681395 is an apocalyptic number.

1681395 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1681395 is a deficient number, since it is larger than the sum of its proper divisors (1027245).

1681395 is a wasteful number, since it uses less digits than its factorization.

1681395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774.

The product of its digits is 6480, while the sum is 33.

The square root of 1681395 is about 1296.6861609503. The cubic root of 1681395 is about 118.9113338058.

The spelling of 1681395 in words is "one million, six hundred eighty-one thousand, three hundred ninety-five".