1394681 has 2 divisors, whose sum is σ = 1394682. Its totient is φ = 1394680.

The previous prime is 1394671. The next prime is 1394683. The reversal of 1394681 is 1864931.

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., 960400 + 434281 = 980^2 + 659^2 .

It is a cyclic number.

It is not a de Polignac number, because 1394681 - 2¹⁰ = 1393657 is a prime.

It is a super-2 number, since 2×1394681² = 3890270183522, which contains 22 as substring.

Together with 1394683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1394683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 697340 + 697341.

It is an arithmetic number, because the mean of its divisors is an integer number (697341).

2^1394681 is an apocalyptic number.

It is an amenable number.

1394681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1394681 is an equidigital number, since it uses as much as digits as its factorization.

1394681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 32.

The square root of 1394681 is about 1180.9661299123. The cubic root of 1394681 is about 111.7270404446.

The spelling of 1394681 in words is "one million, three hundred ninety-four thousand, six hundred eighty-one".