1243012402 has 8 divisors (see below), whose sum is σ = 1864748700. Its totient is φ = 621429504.

The previous prime is 1243012387. The next prime is 1243012403. The reversal of 1243012402 is 2042103421.

It can be written as a sum of positive squares in 2 ways, for example, as 915728121 + 327284281 = 30261^2 + 18091^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 1243012402.

It is not an unprimeable number, because it can be changed into a prime (1243012403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15327 + ... + 52162.

Almost surely, 2^1243012402 is an apocalyptic number.

1243012402 is a deficient number, since it is larger than the sum of its proper divisors (621736298).

1243012402 is an equidigital number, since it uses as much as digits as its factorization.

1243012402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76700.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1243012402 is about 35256.3810111021. The cubic root of 1243012402 is about 1075.2063500039.

Adding to 1243012402 its reverse (2042103421), we get a palindrome (3285115823).

The spelling of 1243012402 in words is "one billion, two hundred forty-three million, twelve thousand, four hundred two".