1243421404 has 12 divisors (see below), whose sum is σ = 2176335000. Its totient is φ = 621611408.

The previous prime is 1243421383. The next prime is 1243421449. The reversal of 1243421404 is 4041243421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8247 + ... + 50545.

It is an arithmetic number, because the mean of its divisors is an integer number (181361250).

Almost surely, 2^1243421404 is an apocalyptic number.

It is an amenable number.

1243421404 is a deficient number, since it is larger than the sum of its proper divisors (932913596).

1243421404 is a wasteful number, since it uses less digits than its factorization.

1243421404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49652 (or 49650 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 1243421404 is about 35262.1809308500. The cubic root of 1243421404 is about 1075.3242660500.

Adding to 1243421404 its reverse (4041243421), we get a palindrome (5284664825).

The spelling of 1243421404 in words is "one billion, two hundred forty-three million, four hundred twenty-one thousand, four hundred four".