1311625 has 16 divisors (see below), whose sum is σ = 1872000. Its totient is φ = 898800.

The previous prime is 1311623. The next prime is 1311643. The reversal of 1311625 is 5261131.

It is not a de Polignac number, because 1311625 - 2¹ = 1311623 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1311623) 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 15 ways as a sum of consecutive naturals, for example, 126 + ... + 1624.

It is an arithmetic number, because the mean of its divisors is an integer number (117000).

2^1311625 is an apocalyptic number.

It is an amenable number.

1311625 is a deficient number, since it is larger than the sum of its proper divisors (560375).

1311625 is an equidigital number, since it uses as much as digits as its factorization.

1311625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1521 (or 1511 counting only the distinct ones).

The product of its digits is 180, while the sum is 19.

The square root of 1311625 is about 1145.2619787629. The cubic root of 1311625 is about 109.4636424265.

Adding to 1311625 its reverse (5261131), we get a palindrome (6572756).

It can be divided in two parts, 1311 and 625, that added together give a square (1936 = 44²).

The spelling of 1311625 in words is "one million, three hundred eleven thousand, six hundred twenty-five".