Base | Representation |
---|---|
bin | 110010001001… |
… | …0100011110101 |
3 | 1211110200200022 |
4 | 1210102203311 |
5 | 23212243141 |
6 | 2335254525 |
7 | 436315313 |
oct | 144224365 |
9 | 54420608 |
10 | 26290421 |
11 | 13927423 |
12 | 897a445 |
13 | 55a6681 |
14 | 36c50b3 |
15 | 2494b4b |
hex | 19128f5 |
26290421 has 2 divisors, whose sum is σ = 26290422. Its totient is φ = 26290420.
The previous prime is 26290409. The next prime is 26290447. The reversal of 26290421 is 12409262.
It is an a-pointer prime, because the next prime (26290447) can be obtained adding 26290421 to its sum of digits (26).
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 26122321 + 168100 = 5111^2 + 410^2 .
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-26290421 is a prime.
It is a Chen prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (26296421) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13145210 + 13145211.
It is an arithmetic number, because the mean of its divisors is an integer number (13145211).
Almost surely, 226290421 is an apocalyptic number.
It is an amenable number.
26290421 is a deficient number, since it is larger than the sum of its proper divisors (1).
26290421 is an equidigital number, since it uses as much as digits as its factorization.
26290421 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 1728, while the sum is 26.
The square root of 26290421 is about 5127.4185512790. The cubic root of 26290421 is about 297.3485649739.
Adding to 26290421 its reverse (12409262), we get a palindrome (38699683).
The spelling of 26290421 in words is "twenty-six million, two hundred ninety thousand, four hundred twenty-one".
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