1311258797 has 8 divisors (see below), whose sum is σ = 1316056896. Its totient is φ = 1306470592.

The previous prime is 1311258763. The next prime is 1311258803. The reversal of 1311258797 is 7978521131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1311258797 - 2¹⁸ = 1310996653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311258757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346208 + ... + 349974.

It is an arithmetic number, because the mean of its divisors is an integer number (164507112).

Almost surely, 2^1311258797 is an apocalyptic number.

It is an amenable number.

1311258797 is a deficient number, since it is larger than the sum of its proper divisors (4798099).

1311258797 is an equidigital number, since it uses as much as digits as its factorization.

1311258797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4947.

The product of its digits is 105840, while the sum is 44.

The square root of 1311258797 is about 36211.3075847863. The cubic root of 1311258797 is about 1094.5345413704.

The spelling of 1311258797 in words is "one billion, three hundred eleven million, two hundred fifty-eight thousand, seven hundred ninety-seven".