1243144402 has 8 divisors (see below), whose sum is σ = 1865054412. Its totient is φ = 621459600.

The previous prime is 1243144393. The next prime is 1243144429. The reversal of 1243144402 is 2044413421.

It can be written as a sum of positive squares in 2 ways, for example, as 960938001 + 282206401 = 30999^2 + 16799^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 41749 + ... + 65032.

Almost surely, 2^1243144402 is an apocalyptic number.

1243144402 is a deficient number, since it is larger than the sum of its proper divisors (621910010).

1243144402 is a wasteful number, since it uses less digits than its factorization.

1243144402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112604.

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

The square root of 1243144402 is about 35258.2529629589. The cubic root of 1243144402 is about 1075.2444086787.

Adding to 1243144402 its reverse (2044413421), we get a palindrome (3287557823).

The spelling of 1243144402 in words is "one billion, two hundred forty-three million, one hundred forty-four thousand, four hundred two".