1001313 has 12 divisors (see below), whose sum is σ = 1467648.
Its totient is φ = 657720.
The previous prime is 1001311. The next prime is 1001321. The reversal of 1001313 is 3131001.
Adding to 1001313 its reverse (3131001), we get a palindrome (4132314).
It can be divided in two parts, 1001 and 313, that multiplied together give a palindrome (313313).
It is not a de Polignac number, because 1001313 - 21 = 1001311 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (9).
It is a junction number, because it is equal to n+sod(n) for n = 1001295 and 1001304.
It is not an unprimeable number, because it can be changed into a prime (1001311) 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 11 ways as a sum of consecutive naturals, for example, 145 + ... + 1422.
It is an arithmetic number, because the mean of its divisors is an integer number (122304).
21001313 is an apocalyptic number.
It is an amenable number.
1001313 is a deficient number, since it is larger than the sum of its proper divisors (466335).
1001313 is a wasteful number, since it uses less digits than its factorization.
1001313 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1644 (or 1641 counting only the distinct ones).
The product of its (nonzero) digits is 9, while the sum is 9.
The square root of 1001313 is about 1000.6562846452.
The cubic root of 1001313 is about 100.0437475254.
The spelling of 1001313 in words is "one million, one thousand, three hundred thirteen".