1243400002 has 16 divisors (see below), whose sum is σ = 2009754432. Its totient is φ = 573538320.

The previous prime is 1243399979. The next prime is 1243400017. The reversal of 1243400002 is 2000043421.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33883 + ... + 60289.

It is an arithmetic number, because the mean of its divisors is an integer number (125609652).

Almost surely, 2^1243400002 is an apocalyptic number.

1243400002 is a deficient number, since it is larger than the sum of its proper divisors (766354430).

1243400002 is a wasteful number, since it uses less digits than its factorization.

1243400002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28233.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 1243400002 is about 35261.8774599425. The cubic root of 1243400002 is about 1075.3180964543.

Adding to 1243400002 its reverse (2000043421), we get a palindrome (3243443423).

The spelling of 1243400002 in words is "one billion, two hundred forty-three million, four hundred thousand, two".