1317291157 has 64 divisors (see below), whose sum is σ = 1749888000. Its totient is φ = 983888640.

The previous prime is 1317291149. The next prime is 1317291169. The reversal of 1317291157 is 7511927131.

It is not a de Polignac number, because 1317291157 - 2³ = 1317291149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317291457) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7887888 + ... + 7888054.

It is an arithmetic number, because the mean of its divisors is an integer number (27342000).

Almost surely, 2^1317291157 is an apocalyptic number.

It is an amenable number.

1317291157 is a deficient number, since it is larger than the sum of its proper divisors (432596843).

1317291157 is a wasteful number, since it uses less digits than its factorization.

1317291157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291 (or 277 counting only the distinct ones).

The product of its digits is 13230, while the sum is 37.

The square root of 1317291157 is about 36294.5058789895. The cubic root of 1317291157 is about 1096.2104188342.

It can be divided in two parts, 13172 and 91157, that added together give a square (104329 = 323²).

The spelling of 1317291157 in words is "one billion, three hundred seventeen million, two hundred ninety-one thousand, one hundred fifty-seven".