1312238 has 4 divisors (see below), whose sum is σ = 1968360. Its totient is φ = 656118.

The previous prime is 1312237. The next prime is 1312277. The reversal of 1312238 is 8322131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8322131 = 2399 ⋅3469.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 328058 + ... + 328061.

It is an arithmetic number, because the mean of its divisors is an integer number (492090).

2^1312238 is an apocalyptic number.

1312238 is a deficient number, since it is larger than the sum of its proper divisors (656122).

1312238 is an equidigital number, since it uses as much as digits as its factorization.

1312238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656121.

The product of its digits is 288, while the sum is 20.

The square root of 1312238 is about 1145.5295718575. The cubic root of 1312238 is about 109.4806927171.

Adding to 1312238 its reverse (8322131), we get a palindrome (9634369).

The spelling of 1312238 in words is "one million, three hundred twelve thousand, two hundred thirty-eight".