1022605 has 4 divisors (see below), whose sum is σ = 1227132. Its totient is φ = 818080.

The previous prime is 1022591. The next prime is 1022611. The reversal of 1022605 is 5062201.

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 346921 + 675684 = 589^2 + 822^2 .

It is not a de Polignac number, because 1022605 - 2⁵ = 1022573 is a prime.

It is a Duffinian number.

1022605 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102256 + ... + 102265.

It is an arithmetic number, because the mean of its divisors is an integer number (306783).

2^1022605 is an apocalyptic number.

It is an amenable number.

1022605 is a deficient number, since it is larger than the sum of its proper divisors (204527).

1022605 is an equidigital number, since it uses as much as digits as its factorization.

1022605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204526.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 1022605 is about 1011.2393386335. The cubic root of 1022605 is about 100.7478926220.

Adding to 1022605 its reverse (5062201), we get a palindrome (6084806).

The spelling of 1022605 in words is "one million, twenty-two thousand, six hundred five".