1336681 has 4 divisors (see below), whose sum is σ = 1340032. Its totient is φ = 1333332.

The previous prime is 1336663. The next prime is 1336729. The reversal of 1336681 is 1866331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1336681 - 2⁵ = 1336649 is a prime.

It is a super-2 number, since 2×1336681² = 3573432191522, which contains 22 as substring.

It is a Duffinian number.

1336681 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1336481) 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, 981 + ... + 1906.

It is an arithmetic number, because the mean of its divisors is an integer number (335008).

2^1336681 is an apocalyptic number.

It is an amenable number.

1336681 is a deficient number, since it is larger than the sum of its proper divisors (3351).

1336681 is an equidigital number, since it uses as much as digits as its factorization.

1336681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3350.

The product of its digits is 2592, while the sum is 28.

The square root of 1336681 is about 1156.1492118235. The cubic root of 1336681 is about 110.1562792432.

The spelling of 1336681 in words is "one million, three hundred thirty-six thousand, six hundred eighty-one".