1422643 has 4 divisors (see below), whose sum is σ = 1452960. Its totient is φ = 1392328.

The previous prime is 1422637. The next prime is 1422647. The reversal of 1422643 is 3462241.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-1422643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1422647) 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, 15088 + ... + 15181.

It is an arithmetic number, because the mean of its divisors is an integer number (363240).

2^1422643 is an apocalyptic number.

1422643 is a deficient number, since it is larger than the sum of its proper divisors (30317).

1422643 is an equidigital number, since it uses as much as digits as its factorization.

1422643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30316.

The product of its digits is 1152, while the sum is 22.

The square root of 1422643 is about 1192.7459913997. The cubic root of 1422643 is about 112.4687781672.

Adding to 1422643 its reverse (3462241), we get a palindrome (4884884).

The spelling of 1422643 in words is "one million, four hundred twenty-two thousand, six hundred forty-three".