1428331 has 8 divisors (see below), whose sum is σ = 1488960. Its totient is φ = 1369032.

The previous prime is 1428281. The next prime is 1428359. The reversal of 1428331 is 1338241.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1428331 is a prime.

It is a super-2 number, since 2×1428331² = 4080258891122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1428431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2256 + ... + 2818.

It is an arithmetic number, because the mean of its divisors is an integer number (186120).

2^1428331 is an apocalyptic number.

1428331 is a deficient number, since it is larger than the sum of its proper divisors (60629).

1428331 is an equidigital number, since it uses as much as digits as its factorization.

1428331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665.

The product of its digits is 576, while the sum is 22.

The square root of 1428331 is about 1195.1280266147. The cubic root of 1428331 is about 112.6184694393.

The spelling of 1428331 in words is "one million, four hundred twenty-eight thousand, three hundred thirty-one".