1253113443 has 8 divisors (see below), whose sum is σ = 1856464400. Its totient is φ = 835408944.

The previous prime is 1253113427. The next prime is 1253113457. The reversal of 1253113443 is 3443113521.

It is a happy number.

1253113443 is a `hidden beast` number, since 1 + 2 + 5 + 311 + 344 + 3 = 666.

It is not a de Polignac number, because 1253113443 - 2⁴ = 1253113427 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 46411609 = 1253113443 / (1 + 2 + 5 + 3 + 1 + 1 + 3 + 4 + 4 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1253133443) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 23205778 + ... + 23205831.

It is an arithmetic number, because the mean of its divisors is an integer number (232058050).

Almost surely, 2^1253113443 is an apocalyptic number.

1253113443 is a deficient number, since it is larger than the sum of its proper divisors (603350957).

1253113443 is an equidigital number, since it uses as much as digits as its factorization.

1253113443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46411618 (or 46411612 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 1253113443 is about 35399.3424091465. The cubic root of 1253113443 is about 1078.1109647776.

Adding to 1253113443 its reverse (3443113521), we get a palindrome (4696226964).

The spelling of 1253113443 in words is "one billion, two hundred fifty-three million, one hundred thirteen thousand, four hundred forty-three".