1312546 has 4 divisors (see below), whose sum is σ = 1968822. Its totient is φ = 656272.

The previous prime is 1312543. The next prime is 1312547. The reversal of 1312546 is 6452131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6452131 = 7 ⋅921733.

It can be written as a sum of positive squares in only one way, i.e., 1311025 + 1521 = 1145^2 + 39^2 .

It is not an unprimeable number, because it can be changed into a prime (1312543) 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 as a sum of consecutive naturals, namely, 328135 + ... + 328138.

2^1312546 is an apocalyptic number.

1312546 is a deficient number, since it is larger than the sum of its proper divisors (656276).

1312546 is an equidigital number, since it uses as much as digits as its factorization.

1312546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656275.

The product of its digits is 720, while the sum is 22.

The square root of 1312546 is about 1145.6639996090. The cubic root of 1312546 is about 109.4892575799.

Adding to 1312546 its reverse (6452131), we get a palindrome (7764677).

The spelling of 1312546 in words is "one million, three hundred twelve thousand, five hundred forty-six".