1243312402 has 8 divisors (see below), whose sum is σ = 1868379696. Its totient is φ = 620519172.

The previous prime is 1243312393. The next prime is 1243312409. The reversal of 1243312402 is 2042133421.

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

It is not an unprimeable number, because it can be changed into a prime (1243312409) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 567148 + ... + 569335.

It is an arithmetic number, because the mean of its divisors is an integer number (233547462).

Almost surely, 2^1243312402 is an apocalyptic number.

1243312402 is a deficient number, since it is larger than the sum of its proper divisors (625067294).

1243312402 is a wasteful number, since it uses less digits than its factorization.

1243312402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137032.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1243312402 is about 35260.6353034088. The cubic root of 1243312402 is about 1075.2928430960.

Adding to 1243312402 its reverse (2042133421), we get a palindrome (3285445823).

The spelling of 1243312402 in words is "one billion, two hundred forty-three million, three hundred twelve thousand, four hundred two".