1249914091 has 2 divisors, whose sum is σ = 1249914092. Its totient is φ = 1249914090.

The previous prime is 1249914089. The next prime is 1249914163. The reversal of 1249914091 is 1904199421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1249914091 - 2¹ = 1249914089 is a prime.

Together with 1249914089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1249914041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624957045 + 624957046.

It is an arithmetic number, because the mean of its divisors is an integer number (624957046).

Almost surely, 2^1249914091 is an apocalyptic number.

1249914091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249914091 is an equidigital number, since it uses as much as digits as its factorization.

1249914091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 1249914091 is about 35354.1241017226. The cubic root of 1249914091 is about 1077.1926664066.

The spelling of 1249914091 in words is "one billion, two hundred forty-nine million, nine hundred fourteen thousand, ninety-one".