1312247 has 4 divisors (see below), whose sum is σ = 1389456. Its totient is φ = 1235040.

The previous prime is 1312237. The next prime is 1312277. The reversal of 1312247 is 7422131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1312247 - 2⁶ = 1312183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312237) 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 in 3 ways as a sum of consecutive naturals, for example, 38579 + ... + 38612.

It is an arithmetic number, because the mean of its divisors is an integer number (347364).

2^1312247 is an apocalyptic number.

1312247 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1312247 is a deficient number, since it is larger than the sum of its proper divisors (77209).

1312247 is an equidigital number, since it uses as much as digits as its factorization.

1312247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77208.

The product of its digits is 336, while the sum is 20.

The square root of 1312247 is about 1145.5335001649. The cubic root of 1312247 is about 109.4809430080.

Adding to 1312247 its reverse (7422131), we get a palindrome (8734378).

The spelling of 1312247 in words is "one million, three hundred twelve thousand, two hundred forty-seven".