1311553 has 2 divisors, whose sum is σ = 1311554. Its totient is φ = 1311552.

The previous prime is 1311547. The next prime is 1311559. The reversal of 1311553 is 3551131.

It is a balanced prime because it is at equal distance from previous prime (1311547) and next prime (1311559).

It can be written as a sum of positive squares in only one way, i.e., 804609 + 506944 = 897^2 + 712^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1311553.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655776 + 655777.

It is an arithmetic number, because the mean of its divisors is an integer number (655777).

2^1311553 is an apocalyptic number.

It is an amenable number.

1311553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311553 is an equidigital number, since it uses as much as digits as its factorization.

1311553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225, while the sum is 19.

The square root of 1311553 is about 1145.2305444757. The cubic root of 1311553 is about 109.4616394336.

Adding to 1311553 its reverse (3551131), we get a palindrome (4862684).

The spelling of 1311553 in words is "one million, three hundred eleven thousand, five hundred fifty-three".