1253415443 has 6 divisors (see below), whose sum is σ = 1458054756. Its totient is φ = 1074356052.

The previous prime is 1253415421. The next prime is 1253415461. The reversal of 1253415443 is 3445143521.

It is not a de Polignac number, because 1253415443 - 2¹⁸ = 1253153299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1253415413) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12789905 + ... + 12790002.

It is an arithmetic number, because the mean of its divisors is an integer number (243009126).

Almost surely, 2^1253415443 is an apocalyptic number.

1253415443 is a deficient number, since it is larger than the sum of its proper divisors (204639313).

1253415443 is an equidigital number, since it uses as much as digits as its factorization.

1253415443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25579921 (or 25579914 counting only the distinct ones).

The product of its digits is 28800, while the sum is 32.

The square root of 1253415443 is about 35403.6077681357. The cubic root of 1253415443 is about 1078.1975659711.

Adding to 1253415443 its reverse (3445143521), we get a palindrome (4698558964).

The spelling of 1253415443 in words is "one billion, two hundred fifty-three million, four hundred fifteen thousand, four hundred forty-three".