1249405319 has 2 divisors, whose sum is σ = 1249405320. Its totient is φ = 1249405318.

The previous prime is 1249405273. The next prime is 1249405321. The reversal of 1249405319 is 9135049421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1249405319 - 2²⁰ = 1248356743 is a prime.

It is a super-2 number, since 2×1249405319² = 3122027302290983522, which contains 22 as substring.

Together with 1249405321, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1249405019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624702659 + 624702660.

It is an arithmetic number, because the mean of its divisors is an integer number (624702660).

Almost surely, 2^1249405319 is an apocalyptic number.

1249405319 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249405319 is an equidigital number, since it uses as much as digits as its factorization.

1249405319 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 1249405319 is about 35346.9279994740. The cubic root of 1249405319 is about 1077.0464910687.

The spelling of 1249405319 in words is "one billion, two hundred forty-nine million, four hundred five thousand, three hundred nineteen".