1171345249 has 2 divisors, whose sum is σ = 1171345250. Its totient is φ = 1171345248.

The previous prime is 1171345213. The next prime is 1171345319. The reversal of 1171345249 is 9425431711.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1151923600 + 19421649 = 33940^2 + 4407^2 .

It is a cyclic number.

It is not a de Polignac number, because 1171345249 - 2²¹ = 1169248097 is a prime.

It is not a weakly prime, because it can be changed into another prime (1171340249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 585672624 + 585672625.

It is an arithmetic number, because the mean of its divisors is an integer number (585672625).

Almost surely, 2^1171345249 is an apocalyptic number.

It is an amenable number.

1171345249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1171345249 is an equidigital number, since it uses as much as digits as its factorization.

1171345249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 1171345249 is about 34224.9214608303. The cubic root of 1171345249 is about 1054.1319421544.

The spelling of 1171345249 in words is "one billion, one hundred seventy-one million, three hundred forty-five thousand, two hundred forty-nine".