1349681 has 4 divisors (see below), whose sum is σ = 1429092. Its totient is φ = 1270272.

The previous prime is 1349671. The next prime is 1349683. The reversal of 1349681 is 1869431.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1869431 = 1193 ⋅1567.

It can be written as a sum of positive squares in 2 ways, for example, as 970225 + 379456 = 985^2 + 616^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1349681 is a prime.

It is a super-2 number, since 2×1349681² = 3643277603522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1349683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39680 + ... + 39713.

It is an arithmetic number, because the mean of its divisors is an integer number (357273).

2^1349681 is an apocalyptic number.

It is an amenable number.

1349681 is a deficient number, since it is larger than the sum of its proper divisors (79411).

1349681 is an equidigital number, since it uses as much as digits as its factorization.

1349681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79410.

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

The square root of 1349681 is about 1161.7577200088. The cubic root of 1349681 is about 110.5122390435.

It can be divided in two parts, 13 and 49681, that added together give a palindrome (49694).

The spelling of 1349681 in words is "one million, three hundred forty-nine thousand, six hundred eighty-one".