1222538 has 16 divisors (see below), whose sum is σ = 1991304. Its totient is φ = 560640.

The previous prime is 1222537. The next prime is 1222561. The reversal of 1222538 is 8352221.

It can be written as a sum of positive squares in 4 ways, for example, as 1087849 + 134689 = 1043^2 + 367^2 .

It is a super-2 number, since 2×1222538² = 2989198322888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1222537) 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, 956 + ... + 1832.

2^1222538 is an apocalyptic number.

1222538 is a deficient number, since it is larger than the sum of its proper divisors (768766).

1222538 is a wasteful number, since it uses less digits than its factorization.

1222538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937.

The product of its digits is 960, while the sum is 23.

The square root of 1222538 is about 1105.6844034353. The cubic root of 1222538 is about 106.9270180985.

Adding to 1222538 its reverse (8352221), we get a palindrome (9574759).

The spelling of 1222538 in words is "one million, two hundred twenty-two thousand, five hundred thirty-eight".