1253444243 has 2 divisors, whose sum is σ = 1253444244. Its totient is φ = 1253444242.

The previous prime is 1253444233. The next prime is 1253444263. The reversal of 1253444243 is 3424443521.

It is a weak prime.

It is an emirp because it is prime and its reverse (3424443521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1253444243 is a prime.

It is a super-2 number, since 2×1253444243² = 3142244940619686098, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1253444233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626722121 + 626722122.

It is an arithmetic number, because the mean of its divisors is an integer number (626722122).

Almost surely, 2^1253444243 is an apocalyptic number.

1253444243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253444243 is an equidigital number, since it uses as much as digits as its factorization.

1253444243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46080, while the sum is 32.

The square root of 1253444243 is about 35404.0145040079. The cubic root of 1253444243 is about 1078.2058239014.

Adding to 1253444243 its reverse (3424443521), we get a palindrome (4677887764).

The spelling of 1253444243 in words is "one billion, two hundred fifty-three million, four hundred forty-four thousand, two hundred forty-three".