1422605 has 4 divisors (see below), whose sum is σ = 1707132. Its totient is φ = 1138080.

The previous prime is 1422601. The next prime is 1422637. The reversal of 1422605 is 5062241.

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 232324 + 1190281 = 482^2 + 1091^2 .

It is not a de Polignac number, because 1422605 - 2² = 1422601 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1422601) 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, 142256 + ... + 142265.

It is an arithmetic number, because the mean of its divisors is an integer number (426783).

2^1422605 is an apocalyptic number.

It is an amenable number.

1422605 is a deficient number, since it is larger than the sum of its proper divisors (284527).

1422605 is an equidigital number, since it uses as much as digits as its factorization.

1422605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284526.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1422605 is about 1192.7300616653. The cubic root of 1422605 is about 112.4677767795.

Adding to 1422605 its reverse (5062241), we get a palindrome (6484846).

The spelling of 1422605 in words is "one million, four hundred twenty-two thousand, six hundred five".