1312610042 has 4 divisors (see below), whose sum is σ = 1968915066. Its totient is φ = 656305020.

The previous prime is 1312610027. The next prime is 1312610053. The reversal of 1312610042 is 2400162131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1073938441 + 238671601 = 32771^2 + 15449^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1312609996 and 1312610023.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328152509 + ... + 328152512.

Almost surely, 2^1312610042 is an apocalyptic number.

1312610042 is a deficient number, since it is larger than the sum of its proper divisors (656305024).

1312610042 is an equidigital number, since it uses as much as digits as its factorization.

1312610042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656305023.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1312610042 is about 36229.9605575275. The cubic root of 1312610042 is about 1094.9103829134.

Adding to 1312610042 its reverse (2400162131), we get a palindrome (3712772173).

The spelling of 1312610042 in words is "one billion, three hundred twelve million, six hundred ten thousand, forty-two".