Base | Representation |
---|---|
bin | 101111101101… |
… | …101101111111 |
3 | 212112110210102 |
4 | 233231231333 |
5 | 11200224111 |
6 | 1124031315 |
7 | 211213364 |
oct | 57555577 |
9 | 25473712 |
10 | 12508031 |
11 | 7073518 |
12 | 423253b |
13 | 278c303 |
14 | 193846b |
15 | 117113b |
hex | bedb7f |
12508031 has 2 divisors, whose sum is σ = 12508032. Its totient is φ = 12508030.
The previous prime is 12508009. The next prime is 12508049. The reversal of 12508031 is 13080521.
It is a strong prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-12508031 is a prime.
It is a super-2 number, since 2×125080312 = 312901678993922, which contains 22 as substring.
It is a Chen prime.
It is a junction number, because it is equal to n+sod(n) for n = 12507994 and 12508012.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (12508081) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6254015 + 6254016.
It is an arithmetic number, because the mean of its divisors is an integer number (6254016).
Almost surely, 212508031 is an apocalyptic number.
12508031 is a deficient number, since it is larger than the sum of its proper divisors (1).
12508031 is an equidigital number, since it uses as much as digits as its factorization.
12508031 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 240, while the sum is 20.
The square root of 12508031 is about 3536.6694784783. The cubic root of 12508031 is about 232.1291331735.
Adding to 12508031 its reverse (13080521), we get a palindrome (25588552).
The spelling of 12508031 in words is "twelve million, five hundred eight thousand, thirty-one".
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