1333681 has 4 divisors (see below), whose sum is σ = 1379700. Its totient is φ = 1287664.

The previous prime is 1333679. The next prime is 1333687. The reversal of 1333681 is 1863331.

It is a happy number.

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 250000 + 1083681 = 500^2 + 1041^2 .

It is a cyclic number.

It is not a de Polignac number, because 1333681 - 2¹ = 1333679 is a prime.

It is a super-2 number, since 2×1333681² = 3557410019522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1333687) 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, 22966 + ... + 23023.

It is an arithmetic number, because the mean of its divisors is an integer number (344925).

2^1333681 is an apocalyptic number.

It is an amenable number.

1333681 is a deficient number, since it is larger than the sum of its proper divisors (46019).

1333681 is an equidigital number, since it uses as much as digits as its factorization.

1333681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46018.

The product of its digits is 1296, while the sum is 25.

The square root of 1333681 is about 1154.8510726496. The cubic root of 1333681 is about 110.0738072155.

The spelling of 1333681 in words is "one million, three hundred thirty-three thousand, six hundred eighty-one".