1313253442 has 4 divisors (see below), whose sum is σ = 1969880166. Its totient is φ = 656626720.

The previous prime is 1313253433. The next prime is 1313253443. The reversal of 1313253442 is 2443523131.

It is a happy number.

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., 1295352081 + 17901361 = 35991^2 + 4231^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1313253442.

It is not an unprimeable number, because it can be changed into a prime (1313253443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328313359 + ... + 328313362.

Almost surely, 2^1313253442 is an apocalyptic number.

1313253442 is a deficient number, since it is larger than the sum of its proper divisors (656626724).

1313253442 is an equidigital number, since it uses as much as digits as its factorization.

1313253442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656626723.

The product of its digits is 8640, while the sum is 28.

The square root of 1313253442 is about 36238.8388610894. The cubic root of 1313253442 is about 1095.0892505250.

Adding to 1313253442 its reverse (2443523131), we get a palindrome (3756776573).

The spelling of 1313253442 in words is "one billion, three hundred thirteen million, two hundred fifty-three thousand, four hundred forty-two".