1249339717 has 4 divisors (see below), whose sum is σ = 1249613100. Its totient is φ = 1249066336.

The previous prime is 1249339681. The next prime is 1249339753. The reversal of 1249339717 is 7179339421.

It is a Cunningham number, because it is equal to 35346²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7179339421 = 59 ⋅121683719.

It is an interprime number because it is at equal distance from previous prime (1249339681) and next prime (1249339753).

It can be written as a sum of positive squares in 2 ways, for example, as 1222621156 + 26718561 = 34966^2 + 5169^2 .

It is a cyclic number.

It is not a de Polignac number, because 1249339717 - 2¹¹ = 1249337669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249330717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129718 + ... + 139015.

It is an arithmetic number, because the mean of its divisors is an integer number (312403275).

Almost surely, 2^1249339717 is an apocalyptic number.

It is an amenable number.

1249339717 is a deficient number, since it is larger than the sum of its proper divisors (273383).

1249339717 is an equidigital number, since it uses as much as digits as its factorization.

1249339717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273382.

The product of its digits is 285768, while the sum is 46.

The square root of 1249339717 is about 35346.0000141459. Note that the first 4 decimals coincide. The cubic root of 1249339717 is about 1077.0276400629.

The spelling of 1249339717 in words is "one billion, two hundred forty-nine million, three hundred thirty-nine thousand, seven hundred seventeen".