1243224404 has 12 divisors (see below), whose sum is σ = 2180670324. Its totient is φ = 620175744.

The previous prime is 1243224379. The next prime is 1243224443. The reversal of 1243224404 is 4044223421.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 72216004 + 1171008400 = 8498^2 + 34220^2 .

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, 357167 + ... + 360630.

It is an arithmetic number, because the mean of its divisors is an integer number (181722527).

Almost surely, 2^1243224404 is an apocalyptic number.

It is an amenable number.

1243224404 is a deficient number, since it is larger than the sum of its proper divisors (937445920).

1243224404 is a wasteful number, since it uses less digits than its factorization.

1243224404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718234 (or 718232 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 1243224404 is about 35259.3874592285. The cubic root of 1243224404 is about 1075.2674738077.

Adding to 1243224404 its reverse (4044223421), we get a palindrome (5287447825).

The spelling of 1243224404 in words is "one billion, two hundred forty-three million, two hundred twenty-four thousand, four hundred four".