1246681 has 4 divisors (see below), whose sum is σ = 1289700. Its totient is φ = 1203664.

The previous prime is 1246673. The next prime is 1246697. The reversal of 1246681 is 1866421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 614656 + 632025 = 784^2 + 795^2 .

It is a cyclic number.

It is not a de Polignac number, because 1246681 - 2³ = 1246673 is a prime.

It is a super-2 number, since 2×1246681² = 3108427031522, which contains 22 as substring.

It is a Duffinian number.

1246681 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1246601) 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, 21466 + ... + 21523.

It is an arithmetic number, because the mean of its divisors is an integer number (322425).

2^1246681 is an apocalyptic number.

It is an amenable number.

1246681 is a deficient number, since it is larger than the sum of its proper divisors (43019).

1246681 is an equidigital number, since it uses as much as digits as its factorization.

1246681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43018.

The product of its digits is 2304, while the sum is 28.

The square root of 1246681 is about 1116.5487002366. The cubic root of 1246681 is about 107.6263090773.

The spelling of 1246681 in words is "one million, two hundred forty-six thousand, six hundred eighty-one".