1253241391 has 2 divisors, whose sum is σ = 1253241392. Its totient is φ = 1253241390.

The previous prime is 1253241389. The next prime is 1253241419. The reversal of 1253241391 is 1931423521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1253241391 - 2¹ = 1253241389 is a prime.

It is a super-2 number, since 2×1253241391² = 3141227968231229762, which contains 22 as substring.

Together with 1253241389, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1253241191) 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 as a sum of consecutive naturals, namely, 626620695 + 626620696.

It is an arithmetic number, because the mean of its divisors is an integer number (626620696).

Almost surely, 2^1253241391 is an apocalyptic number.

1253241391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253241391 is an equidigital number, since it uses as much as digits as its factorization.

1253241391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 31.

The square root of 1253241391 is about 35401.1495717300. The cubic root of 1253241391 is about 1078.1476567063.

The spelling of 1253241391 in words is "one billion, two hundred fifty-three million, two hundred forty-one thousand, three hundred ninety-one".