1318549 has 2 divisors, whose sum is σ = 1318550. Its totient is φ = 1318548.

The previous prime is 1318517. The next prime is 1318553. The reversal of 1318549 is 9458131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1306449 + 12100 = 1143^2 + 110^2 .

It is a cyclic number.

It is not a de Polignac number, because 1318549 - 2⁵ = 1318517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1318549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1318579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659274 + 659275.

It is an arithmetic number, because the mean of its divisors is an integer number (659275).

2^1318549 is an apocalyptic number.

It is an amenable number.

1318549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318549 is an equidigital number, since it uses as much as digits as its factorization.

1318549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 31.

The square root of 1318549 is about 1148.2808889814. The cubic root of 1318549 is about 109.6559220982.

The spelling of 1318549 in words is "one million, three hundred eighteen thousand, five hundred forty-nine".