1253453491 has 2 divisors, whose sum is σ = 1253453492. Its totient is φ = 1253453490.

The previous prime is 1253453449. The next prime is 1253453521. The reversal of 1253453491 is 1943543521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1253453491 - 2⁷ = 1253453363 is a prime.

It is a super-2 number, since 2×1253453491² = 3142291308200174162, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1253453491.

It is not a weakly prime, because it can be changed into another prime (1253453431) 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, 626726745 + 626726746.

It is an arithmetic number, because the mean of its divisors is an integer number (626726746).

Almost surely, 2^1253453491 is an apocalyptic number.

1253453491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253453491 is an equidigital number, since it uses as much as digits as its factorization.

1253453491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 37.

The square root of 1253453491 is about 35404.1451104246. The cubic root of 1253453491 is about 1078.2084755877.

The spelling of 1253453491 in words is "one billion, two hundred fifty-three million, four hundred fifty-three thousand, four hundred ninety-one".