1243522 has 12 divisors (see below), whose sum is σ = 2169990. Its totient is φ = 532896.

The previous prime is 1243511. The next prime is 1243523. The reversal of 1243522 is 2253421.

It can be written as a sum of positive squares in only one way, i.e., 1207801 + 35721 = 1099^2 + 189^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1243522.

It is not an unprimeable number, because it can be changed into a prime (1243523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6247 + ... + 6442.

2^1243522 is an apocalyptic number.

1243522 is a deficient number, since it is larger than the sum of its proper divisors (926468).

1243522 is a wasteful number, since it uses less digits than its factorization.

1243522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12705 (or 12698 counting only the distinct ones).

The product of its digits is 480, while the sum is 19.

The square root of 1243522 is about 1115.1331759032. The cubic root of 1243522 is about 107.5353264104.

Adding to 1243522 its reverse (2253421), we get a palindrome (3496943).

It can be divided in two parts, 1243 and 522, that multiplied together give a palindrome (648846).

The spelling of 1243522 in words is "one million, two hundred forty-three thousand, five hundred twenty-two".