1328331 has 4 divisors (see below), whose sum is σ = 1771112. Its totient is φ = 885552.

The previous prime is 1328323. The next prime is 1328351. The reversal of 1328331 is 1338231.

It is a happy number.

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

It is not a de Polignac number, because 1328331 - 2³ = 1328323 is a prime.

It is a super-2 number, since 2×1328331² = 3528926491122, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1328298 and 1328307.

It is not an unprimeable number, because it can be changed into a prime (1328311) 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, 221386 + ... + 221391.

It is an arithmetic number, because the mean of its divisors is an integer number (442778).

2^1328331 is an apocalyptic number.

1328331 is a deficient number, since it is larger than the sum of its proper divisors (442781).

1328331 is an equidigital number, since it uses as much as digits as its factorization.

1328331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442780.

The product of its digits is 432, while the sum is 21.

The square root of 1328331 is about 1152.5324290448. The cubic root of 1328331 is about 109.9264246280.

The spelling of 1328331 in words is "one million, three hundred twenty-eight thousand, three hundred thirty-one".