1312625 has 8 divisors (see below), whose sum is σ = 1638312. Its totient is φ = 1050000.

The previous prime is 1312603. The next prime is 1312637. The reversal of 1312625 is 5262131.

It can be written as a sum of positive squares in 4 ways, for example, as 128881 + 1183744 = 359^2 + 1088^2 .

It is not a de Polignac number, because 1312625 - 2⁶ = 1312561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1312597 and 1312606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5126 + ... + 5375.

It is an arithmetic number, because the mean of its divisors is an integer number (204789).

2^1312625 is an apocalyptic number.

It is an amenable number.

1312625 is a deficient number, since it is larger than the sum of its proper divisors (325687).

1312625 is an equidigital number, since it uses as much as digits as its factorization.

1312625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10516 (or 10506 counting only the distinct ones).

The product of its digits is 360, while the sum is 20.

The square root of 1312625 is about 1145.6984769127. The cubic root of 1312625 is about 109.4914541957.

Adding to 1312625 its reverse (5262131), we get a palindrome (6574756).

The spelling of 1312625 in words is "one million, three hundred twelve thousand, six hundred twenty-five".