1428231 has 16 divisors (see below), whose sum is σ = 2271744. Its totient is φ = 780384.

The previous prime is 1428209. The next prime is 1428233. The reversal of 1428231 is 1328241.

It is not a de Polignac number, because 1428231 - 2⁵ = 1428199 is a prime.

It is a super-2 number, since 2×1428231² = 4079687578722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 1428198 and 1428207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428233) 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 15 ways as a sum of consecutive naturals, for example, 996 + ... + 1961.

It is an arithmetic number, because the mean of its divisors is an integer number (141984).

2^1428231 is an apocalyptic number.

1428231 is a deficient number, since it is larger than the sum of its proper divisors (843513).

1428231 is a wasteful number, since it uses less digits than its factorization.

1428231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2990.

The product of its digits is 384, while the sum is 21.

The square root of 1428231 is about 1195.0861893604. The cubic root of 1428231 is about 112.6158411713.

The spelling of 1428231 in words is "one million, four hundred twenty-eight thousand, two hundred thirty-one".