1253313420442 has 4 divisors (see below), whose sum is σ = 1879970130666. Its totient is φ = 626656710220.

The previous prime is 1253313420397. The next prime is 1253313420571. The reversal of 1253313420442 is 2440243133521.

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., 890416817161 + 362896603281 = 943619^2 + 602409^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1253313420398 and 1253313420407.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313328355109 + ... + 313328355112.

Almost surely, 2^{1253313420442} is an apocalyptic number.

1253313420442 is a deficient number, since it is larger than the sum of its proper divisors (626656710224).

1253313420442 is an equidigital number, since it uses as much as digits as its factorization.

1253313420442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626656710223.

The product of its (nonzero) digits is 69120, while the sum is 34.

Adding to 1253313420442 its reverse (2440243133521), we get a palindrome (3693556553963).

The spelling of 1253313420442 in words is "one trillion, two hundred fifty-three billion, three hundred thirteen million, four hundred twenty thousand, four hundred forty-two".