1243406 has 4 divisors (see below), whose sum is σ = 1865112. Its totient is φ = 621702.

The previous prime is 1243393. The next prime is 1243421. The reversal of 1243406 is 6043421.

It is a happy number.

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

It is a d-powerful number, because it can be written as 1 + 2 + 4⁷ + 3¹¹ + 4¹⁰ + 0 + 6⁴ .

It is a congruent number.

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, 310850 + ... + 310853.

It is an arithmetic number, because the mean of its divisors is an integer number (466278).

2^1243406 is an apocalyptic number.

1243406 is a deficient number, since it is larger than the sum of its proper divisors (621706).

1243406 is an equidigital number, since it uses as much as digits as its factorization.

1243406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621705.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1243406 is about 1115.0811629653. The cubic root of 1243406 is about 107.5319825516.

Adding to 1243406 its reverse (6043421), we get a palindrome (7286827).

The spelling of 1243406 in words is "one million, two hundred forty-three thousand, four hundred six".