1249765453 has 2 divisors, whose sum is σ = 1249765454. Its totient is φ = 1249765452.

The previous prime is 1249765417. The next prime is 1249765487. The reversal of 1249765453 is 3545679421.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 722695689 + 527069764 = 26883^2 + 22958^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1249765453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1249795453) 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, 624882726 + 624882727.

It is an arithmetic number, because the mean of its divisors is an integer number (624882727).

Almost surely, 2^1249765453 is an apocalyptic number.

It is an amenable number.

1249765453 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249765453 is an equidigital number, since it uses as much as digits as its factorization.

1249765453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 907200, while the sum is 46.

The square root of 1249765453 is about 35352.0219082304. The cubic root of 1249765453 is about 1077.1499653090.

The spelling of 1249765453 in words is "one billion, two hundred forty-nine million, seven hundred sixty-five thousand, four hundred fifty-three".