1249700317 has 4 divisors (see below), whose sum is σ = 1249978876. Its totient is φ = 1249421760.

The previous prime is 1249700293. The next prime is 1249700321. The reversal of 1249700317 is 7130079421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7130079421 = 983 ⋅7253387.

It can be written as a sum of positive squares in 2 ways, for example, as 771228441 + 478471876 = 27771^2 + 21874^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1249700317 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 (1249700017) 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 in 3 ways as a sum of consecutive naturals, for example, 132438 + ... + 141559.

It is an arithmetic number, because the mean of its divisors is an integer number (312494719).

Almost surely, 2^1249700317 is an apocalyptic number.

It is an amenable number.

1249700317 is a deficient number, since it is larger than the sum of its proper divisors (278559).

1249700317 is an equidigital number, since it uses as much as digits as its factorization.

1249700317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278558.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 1249700317 is about 35351.1006476460. The cubic root of 1249700317 is about 1077.1312518086.

Adding to 1249700317 its reverse (7130079421), we get a palindrome (8379779738).

The spelling of 1249700317 in words is "one billion, two hundred forty-nine million, seven hundred thousand, three hundred seventeen".