1421028 has 36 divisors (see below), whose sum is σ = 4105920. Its totient is φ = 405936.

The previous prime is 1421027. The next prime is 1421039. The reversal of 1421028 is 8201241.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 1421028.

It is not an unprimeable number, because it can be changed into a prime (1421027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2568 + ... + 3071.

2^1421028 is an apocalyptic number.

1421028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1421028 is an abundant number, since it is smaller than the sum of its proper divisors (2684892).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1421028 is a wasteful number, since it uses less digits than its factorization.

1421028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5656 (or 5651 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1421028 is about 1192.0687899614. The cubic root of 1421028 is about 112.4262034542.

Adding to 1421028 its reverse (8201241), we get a palindrome (9622269).

The spelling of 1421028 in words is "one million, four hundred twenty-one thousand, twenty-eight".