1421089 has 4 divisors (see below), whose sum is σ = 1447956. Its totient is φ = 1394224.

The previous prime is 1421083. The next prime is 1421093. The reversal of 1421089 is 9801241.

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: 9801241 = 331 ⋅29611.

It can be written as a sum of positive squares in 2 ways, for example, as 1040400 + 380689 = 1020^2 + 617^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421089 - 2⁹ = 1420577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421083) 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 3 ways as a sum of consecutive naturals, for example, 13354 + ... + 13459.

It is an arithmetic number, because the mean of its divisors is an integer number (361989).

2^1421089 is an apocalyptic number.

It is an amenable number.

1421089 is a deficient number, since it is larger than the sum of its proper divisors (26867).

1421089 is an equidigital number, since it uses as much as digits as its factorization.

1421089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26866.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 1421089 is about 1192.0943754586. The cubic root of 1421089 is about 112.4278121253.

The spelling of 1421089 in words is "one million, four hundred twenty-one thousand, eighty-nine".