1351813 has 2 divisors, whose sum is σ = 1351814. Its totient is φ = 1351812.
The previous prime is 1351799. The next prime is 1351829. The reversal of 1351813 is 3181531.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 879844 + 471969 = 938^2 + 687^2 .
It is a cyclic number.
It is not a de Polignac number, because 1351813 - 25 = 1351781 is a prime.
1351813 is a lucky number.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (1351843) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 675906 + 675907.
It is an arithmetic number, because the mean of its divisors is an integer number (675907).
21351813 is an apocalyptic number.
It is an amenable number.
1351813 is a deficient number, since it is larger than the sum of its proper divisors (1).
1351813 is an equidigital number, since it uses as much as digits as its factorization.
1351813 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 360, while the sum is 22.
The square root of 1351813 is about 1162.6749330746. The cubic root of 1351813 is about 110.5703980065.
It can be divided in two parts, 13518 and 13, that added together give a palindrome (13531).
The spelling of 1351813 in words is "one million, three hundred fifty-one thousand, eight hundred thirteen".
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