1421128 has 16 divisors (see below), whose sum is σ = 2677500. Its totient is φ = 707136.

The previous prime is 1421113. The next prime is 1421141. The reversal of 1421128 is 8211241.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1304164 + 116964 = 1142^2 + 342^2 .

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2538 + ... + 3046.

2^1421128 is an apocalyptic number.

It is an amenable number.

1421128 is a deficient number, since it is larger than the sum of its proper divisors (1256372).

1421128 is a wasteful number, since it uses less digits than its factorization.

1421128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864 (or 860 counting only the distinct ones).

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

The square root of 1421128 is about 1192.1107331117. The cubic root of 1421128 is about 112.4288405959.

Adding to 1421128 its reverse (8211241), we get a palindrome (9632369).

The spelling of 1421128 in words is "one million, four hundred twenty-one thousand, one hundred twenty-eight".