1312603442 has 4 divisors (see below), whose sum is σ = 1968905166. Its totient is φ = 656301720.

The previous prime is 1312603433. The next prime is 1312603463. The reversal of 1312603442 is 2443062131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2443062131 = 31123 ⋅78497.

It can be written as a sum of positive squares in only one way, i.e., 1312540441 + 63001 = 36229^2 + 251^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328150859 + ... + 328150862.

Almost surely, 2^1312603442 is an apocalyptic number.

1312603442 is a deficient number, since it is larger than the sum of its proper divisors (656301724).

1312603442 is an equidigital number, since it uses as much as digits as its factorization.

1312603442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656301723.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 1312603442 is about 36229.8694725775. The cubic root of 1312603442 is about 1094.9085477858.

Adding to 1312603442 its reverse (2443062131), we get a palindrome (3755665573).

The spelling of 1312603442 in words is "one billion, three hundred twelve million, six hundred three thousand, four hundred forty-two".