1318157 has 2 divisors, whose sum is σ = 1318158. Its totient is φ = 1318156.

The previous prime is 1318147. The next prime is 1318169. The reversal of 1318157 is 7518131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1069156 + 249001 = 1034^2 + 499^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1318157 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1318147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659078 + 659079.

It is an arithmetic number, because the mean of its divisors is an integer number (659079).

2^1318157 is an apocalyptic number.

It is an amenable number.

1318157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318157 is an equidigital number, since it uses as much as digits as its factorization.

1318157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 840, while the sum is 26.

The square root of 1318157 is about 1148.1101863497. The cubic root of 1318157 is about 109.6450542473.

Subtracting from 1318157 its sum of digits (26), we obtain a palindrome (1318131).

The spelling of 1318157 in words is "one million, three hundred eighteen thousand, one hundred fifty-seven".