1420889 has 4 divisors (see below), whose sum is σ = 1423524. Its totient is φ = 1418256.

The previous prime is 1420883. The next prime is 1420891. The reversal of 1420889 is 9880241.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 883600 + 537289 = 940^2 + 733^2 .

It is a cyclic number.

It is not a de Polignac number, because 1420889 - 2⁸ = 1420633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1420883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182 + ... + 1695.

It is an arithmetic number, because the mean of its divisors is an integer number (355881).

2^1420889 is an apocalyptic number.

It is an amenable number.

1420889 is a deficient number, since it is larger than the sum of its proper divisors (2635).

1420889 is an equidigital number, since it uses as much as digits as its factorization.

1420889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2634.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 1420889 is about 1192.0104865311. The cubic root of 1420889 is about 112.4225376217.

The spelling of 1420889 in words is "one million, four hundred twenty thousand, eight hundred eighty-nine".