1318245391 has 8 divisors (see below), whose sum is σ = 1382692320. Its totient is φ = 1254392832.

The previous prime is 1318245359. The next prime is 1318245421. The reversal of 1318245391 is 1935428131.

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 1318245391 - 2⁵ = 1318245359 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1318245391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318245311) 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, 144046 + ... + 152923.

It is an arithmetic number, because the mean of its divisors is an integer number (172836540).

Almost surely, 2^1318245391 is an apocalyptic number.

1318245391 is a deficient number, since it is larger than the sum of its proper divisors (64446929).

1318245391 is a wasteful number, since it uses less digits than its factorization.

1318245391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297185.

The product of its digits is 25920, while the sum is 37.

The square root of 1318245391 is about 36307.6492078460. The cubic root of 1318245391 is about 1096.4750499721.

The spelling of 1318245391 in words is "one billion, three hundred eighteen million, two hundred forty-five thousand, three hundred ninety-one".