1222564 has 24 divisors (see below), whose sum is σ = 2499840. Its totient is φ = 512256.

The previous prime is 1222561. The next prime is 1222567. The reversal of 1222564 is 4652221.

It is an interprime number because it is at equal distance from previous prime (1222561) and next prime (1222567).

It is not an unprimeable number, because it can be changed into a prime (1222561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 852 + ... + 1780.

It is an arithmetic number, because the mean of its divisors is an integer number (104160).

2^1222564 is an apocalyptic number.

1222564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1249920).

1222564 is an abundant number, since it is smaller than the sum of its proper divisors (1277276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1222564 is a wasteful number, since it uses less digits than its factorization.

1222564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987 (or 985 counting only the distinct ones).

The product of its digits is 960, while the sum is 22.

The square root of 1222564 is about 1105.6961607964. The cubic root of 1222564 is about 106.9277761070.

Adding to 1222564 its reverse (4652221), we get a palindrome (5874785).

The spelling of 1222564 in words is "one million, two hundred twenty-two thousand, five hundred sixty-four".