1311525 has 48 divisors (see below), whose sum is σ = 2529600. Its totient is φ = 665280.

The previous prime is 1311523. The next prime is 1311547. The reversal of 1311525 is 5251131.

It is not a de Polignac number, because 1311525 - 2¹ = 1311523 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1311498 and 1311507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19542 + ... + 19608.

It is an arithmetic number, because the mean of its divisors is an integer number (52700).

2^1311525 is an apocalyptic number.

1311525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1311525 is a deficient number, since it is larger than the sum of its proper divisors (1218075).

1311525 is a wasteful number, since it uses less digits than its factorization.

1311525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115 (or 104 counting only the distinct ones).

The product of its digits is 150, while the sum is 18.

The square root of 1311525 is about 1145.2183197976. The cubic root of 1311525 is about 109.4608604722.

Adding to 1311525 its reverse (5251131), we get a palindrome (6562656).

The spelling of 1311525 in words is "one million, three hundred eleven thousand, five hundred twenty-five".