1610681 has 2 divisors, whose sum is σ = 1610682. Its totient is φ = 1610680.

The previous prime is 1610659. The next prime is 1610701. The reversal of 1610681 is 1860161.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1585081 + 25600 = 1259^2 + 160^2 .

It is a cyclic number.

It is not a de Polignac number, because 1610681 - 2¹⁴ = 1594297 is a prime.

It is a super-2 number, since 2×1610681² = 5188586567522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1610981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805340 + 805341.

It is an arithmetic number, because the mean of its divisors is an integer number (805341).

2^1610681 is an apocalyptic number.

It is an amenable number.

1610681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1610681 is an equidigital number, since it uses as much as digits as its factorization.

1610681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 1610681 is about 1269.1260772673. The cubic root of 1610681 is about 117.2203944753.

The spelling of 1610681 in words is "one million, six hundred ten thousand, six hundred eighty-one".