1317148261 has 16 divisors (see below), whose sum is σ = 1561633920. Its totient is φ = 1095145920.

The previous prime is 1317148249. The next prime is 1317148289. The reversal of 1317148261 is 1628417131.

It is a de Polignac number, because none of the positive numbers 2^k-1317148261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317148201) 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 in 15 ways as a sum of consecutive naturals, for example, 26665 + ... + 57838.

It is an arithmetic number, because the mean of its divisors is an integer number (97602120).

Almost surely, 2^1317148261 is an apocalyptic number.

1317148261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1317148261 is a deficient number, since it is larger than the sum of its proper divisors (244485659).

1317148261 is a wasteful number, since it uses less digits than its factorization.

1317148261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84636.

The product of its digits is 8064, while the sum is 34.

The square root of 1317148261 is about 36292.5372631895. The cubic root of 1317148261 is about 1096.1707794708.

The spelling of 1317148261 in words is "one billion, three hundred seventeen million, one hundred forty-eight thousand, two hundred sixty-one".