1312637 has 2 divisors, whose sum is σ = 1312638. Its totient is φ = 1312636.

The previous prime is 1312603. The next prime is 1312657. The reversal of 1312637 is 7362131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1223236 + 89401 = 1106^2 + 299^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312637 - 2¹⁶ = 1247101 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656318 + 656319.

It is an arithmetic number, because the mean of its divisors is an integer number (656319).

2^1312637 is an apocalyptic number.

It is an amenable number.

1312637 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312637 is an equidigital number, since it uses as much as digits as its factorization.

1312637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756, while the sum is 23.

The square root of 1312637 is about 1145.7037138807. The cubic root of 1312637 is about 109.4917878511.

Adding to 1312637 its reverse (7362131), we get a palindrome (8674768).

The spelling of 1312637 in words is "one million, three hundred twelve thousand, six hundred thirty-seven".