1239993 has 6 divisors (see below), whose sum is σ = 1791114. Its totient is φ = 826656.
The previous prime is 1239989. The next prime is 1240007. The reversal of 1239993 is 3999321.
It can be written as a sum of positive squares in only one way, i.e., 725904 + 514089 = 852^2 + 717^2 .
It is not a de Polignac number, because 1239993 - 22 = 1239989 is a prime.
It is a Curzon number.
It is not an unprimeable number, because it can be changed into a prime (1239913) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68880 + ... + 68897.
It is an arithmetic number, because the mean of its divisors is an integer number (298519).
21239993 is an apocalyptic number.
It is an amenable number.
1239993 is a deficient number, since it is larger than the sum of its proper divisors (551121).
1239993 is a wasteful number, since it uses less digits than its factorization.
1239993 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 137783 (or 137780 counting only the distinct ones).
The product of its digits is 13122, while the sum is 36.
The square root of 1239993 is about 1113.5497294688. The cubic root of 1239993 is about 107.4335049383.
The spelling of 1239993 in words is "one million, two hundred thirty-nine thousand, nine hundred ninety-three".
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