1249434491 has 2 divisors, whose sum is σ = 1249434492. Its totient is φ = 1249434490.

The previous prime is 1249434467. The next prime is 1249434503. The reversal of 1249434491 is 1944349421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1249434491 - 2²² = 1245240187 is a prime.

It is a super-2 number, since 2×1249434491² = 3122173094600858162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1249433491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624717245 + 624717246.

It is an arithmetic number, because the mean of its divisors is an integer number (624717246).

Almost surely, 2^1249434491 is an apocalyptic number.

1249434491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249434491 is an equidigital number, since it uses as much as digits as its factorization.

1249434491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 41.

The square root of 1249434491 is about 35347.3406496161. The cubic root of 1249434491 is about 1077.0548735514.

The spelling of 1249434491 in words is "one billion, two hundred forty-nine million, four hundred thirty-four thousand, four hundred ninety-one".