1428211 has 4 divisors (see below), whose sum is σ = 1503400. Its totient is φ = 1353024.

The previous prime is 1428209. The next prime is 1428233. The reversal of 1428211 is 1128241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1128241 = 37 ⋅30493.

It is a cyclic number.

It is not a de Polignac number, because 1428211 - 2¹ = 1428209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 75169 = 1428211 / (1 + 4 + 2 + 8 + 2 + 1 + 1).

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1428281) 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 3 ways as a sum of consecutive naturals, for example, 37566 + ... + 37603.

It is an arithmetic number, because the mean of its divisors is an integer number (375850).

2^1428211 is an apocalyptic number.

1428211 is a deficient number, since it is larger than the sum of its proper divisors (75189).

1428211 is an equidigital number, since it uses as much as digits as its factorization.

1428211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75188.

The product of its digits is 128, while the sum is 19.

The square root of 1428211 is about 1195.0778217338. The cubic root of 1428211 is about 112.6153155030.

The spelling of 1428211 in words is "one million, four hundred twenty-eight thousand, two hundred eleven".