1243242 has 128 divisors (see below), whose sum is σ = 3870720. Its totient is φ = 285120.

The previous prime is 1243211. The next prime is 1243271. The reversal of 1243242 is 2423421.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 54043 + ... + 54065.

It is an arithmetic number, because the mean of its divisors is an integer number (30240).

2^1243242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1243242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1935360).

1243242 is an abundant number, since it is smaller than the sum of its proper divisors (2627478).

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

1243242 is a wasteful number, since it uses less digits than its factorization.

1243242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65 (or 59 counting only the distinct ones).

The product of its digits is 384, while the sum is 18.

The square root of 1243242 is about 1115.0076232923. The cubic root of 1243242 is about 107.5272546723.

Adding to 1243242 its reverse (2423421), we get a palindrome (3666663).

It can be divided in two parts, 1243 and 242, that added together give a triangular number (1485 = T₅₄).

The spelling of 1243242 in words is "one million, two hundred forty-three thousand, two hundred forty-two".