1222637 has 4 divisors (see below), whose sum is σ = 1316700. Its totient is φ = 1128576.

The previous prime is 1222633. The next prime is 1222643. The reversal of 1222637 is 7362221.

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 724201 + 498436 = 851^2 + 706^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222637 - 2² = 1222633 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 (1222633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47012 + ... + 47037.

It is an arithmetic number, because the mean of its divisors is an integer number (329175).

2^1222637 is an apocalyptic number.

It is an amenable number.

1222637 is a deficient number, since it is larger than the sum of its proper divisors (94063).

1222637 is an equidigital number, since it uses as much as digits as its factorization.

1222637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94062.

The product of its digits is 1008, while the sum is 23.

The square root of 1222637 is about 1105.7291711807. The cubic root of 1222637 is about 106.9299043043.

Adding to 1222637 its reverse (7362221), we get a palindrome (8584858).

The spelling of 1222637 in words is "one million, two hundred twenty-two thousand, six hundred thirty-seven".