1312031 has 4 divisors (see below), whose sum is σ = 1499472.
Its totient is φ = 1124592.
The previous prime is 1312027. The next prime is 1312079. The reversal of 1312031 is 1302131.
Adding to 1312031 its reverse (1302131), we get a palindrome (2614162).
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1302131 = 127 ⋅10253.
It is not a de Polignac number, because 1312031 - 22 = 1312027 is a prime.
It is a super-2 number, since 2×13120312 = 3442850689922, which contains 22 as substring.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1312001) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93710 + ... + 93723.
It is an arithmetic number, because the mean of its divisors is an integer number (374868).
21312031 is an apocalyptic number.
1312031 is a deficient number, since it is larger than the sum of its proper divisors (187441).
1312031 is an equidigital number, since it uses as much as digits as its factorization.
1312031 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 187440.
The product of its (nonzero) digits is 18, while the sum is 11.
The square root of 1312031 is about 1145.4392170692.
The cubic root of 1312031 is about 109.4749357088.
The spelling of 1312031 in words is "one million, three hundred twelve thousand, thirty-one".