1291317124 has 6 divisors (see below), whose sum is σ = 2259804974. Its totient is φ = 645658560.

The previous prime is 1291317107. The next prime is 1291317143. The reversal of 1291317124 is 4217131921.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1276632900 + 14684224 = 35730^2 + 3832^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 161414637 + ... + 161414644.

Almost surely, 2^1291317124 is an apocalyptic number.

It is an amenable number.

1291317124 is a deficient number, since it is larger than the sum of its proper divisors (968487850).

1291317124 is a wasteful number, since it uses less digits than its factorization.

1291317124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322829285 (or 322829283 counting only the distinct ones).

The product of its digits is 3024, while the sum is 31.

The square root of 1291317124 is about 35934.9011964692. The cubic root of 1291317124 is about 1088.9575995159.

It can be divided in two parts, 12 and 91317124, that added together give a square (91317136 = 9556²).

The spelling of 1291317124 in words is "one billion, two hundred ninety-one million, three hundred seventeen thousand, one hundred twenty-four".