1248631317 has 12 divisors (see below), whose sum is σ = 1909671660. Its totient is φ = 783454848.

The previous prime is 1248631309. The next prime is 1248631339. The reversal of 1248631317 is 7131368421.

It is a happy number.

1248631317 is a `hidden beast` number, since 1 + 2 + 4 + 8 + 631 + 3 + 17 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 817902801 + 430728516 = 28599^2 + 20754^2 .

It is not a de Polignac number, because 1248631317 - 2³ = 1248631309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1248631357) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4080342 + ... + 4080647.

It is an arithmetic number, because the mean of its divisors is an integer number (159139305).

Almost surely, 2^1248631317 is an apocalyptic number.

1248631317 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1248631317 is a deficient number, since it is larger than the sum of its proper divisors (661040343).

1248631317 is a wasteful number, since it uses less digits than its factorization.

1248631317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8161012 (or 8161009 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 1248631317 is about 35335.9776573396. The cubic root of 1248631317 is about 1076.8240363457.

Adding to 1248631317 its reverse (7131368421), we get a palindrome (8379999738).

The spelling of 1248631317 in words is "one billion, two hundred forty-eight million, six hundred thirty-one thousand, three hundred seventeen".