1317603261 has 24 divisors (see below), whose sum is σ = 1963727616. Its totient is φ = 784667520.

The previous prime is 1317603251. The next prime is 1317603271. The reversal of 1317603261 is 1623067131.

1317603261 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1317603251) and next prime (1317603271).

It is not a de Polignac number, because 1317603261 - 2⁵ = 1317603229 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317603251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26200 + ... + 57633.

It is an arithmetic number, because the mean of its divisors is an integer number (81821984).

Almost surely, 2^1317603261 is an apocalyptic number.

It is an amenable number.

1317603261 is a deficient number, since it is larger than the sum of its proper divisors (646124355).

1317603261 is a wasteful number, since it uses less digits than its factorization.

1317603261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83893 (or 83880 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 1317603261 is about 36298.8052282716. The cubic root of 1317603261 is about 1096.2969865450.

The spelling of 1317603261 in words is "one billion, three hundred seventeen million, six hundred three thousand, two hundred sixty-one".