1326731 has 8 divisors (see below), whose sum is σ = 1605600. Its totient is φ = 1070208.

The previous prime is 1326727. The next prime is 1326739. The reversal of 1326731 is 1376231.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1326731 - 2² = 1326727 is a prime.

It is a super-2 number, since 2×1326731² = 3520430292722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1326697 and 1326706.

It is not an unprimeable number, because it can be changed into a prime (1326739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5456 + ... + 5693.

It is an arithmetic number, because the mean of its divisors is an integer number (200700).

2^1326731 is an apocalyptic number.

1326731 is a deficient number, since it is larger than the sum of its proper divisors (278869).

1326731 is a wasteful number, since it uses less digits than its factorization.

1326731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11173.

The product of its digits is 756, while the sum is 23.

The square root of 1326731 is about 1151.8380962618. The cubic root of 1326731 is about 109.8822707375.

The spelling of 1326731 in words is "one million, three hundred twenty-six thousand, seven hundred thirty-one".