1243442 has 4 divisors (see below), whose sum is σ = 1865166. Its totient is φ = 621720.

The previous prime is 1243439. The next prime is 1243471. The reversal of 1243442 is 2443421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 919681 + 323761 = 959^2 + 569^2 .

It is a super-2 number, since 2×1243442² = 3092296014728, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 310859 + ... + 310862.

2^1243442 is an apocalyptic number.

1243442 is a deficient number, since it is larger than the sum of its proper divisors (621724).

1243442 is an equidigital number, since it uses as much as digits as its factorization.

1243442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621723.

The product of its digits is 768, while the sum is 20.

The square root of 1243442 is about 1115.0973051712. The cubic root of 1243442 is about 107.5330203232.

Adding to 1243442 its reverse (2443421), we get a palindrome (3686863).

The spelling of 1243442 in words is "one million, two hundred forty-three thousand, four hundred forty-two".