12645533 has 2 divisors, whose sum is σ = 12645534.
Its totient is φ = 12645532.
The previous prime is 12645509. The next prime is 12645547. The reversal of 12645533 is 33554621.
12645533 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 6360484 + 6285049 = 2522^2 + 2507^2
It is a cyclic number.
It is not a de Polignac number, because 12645533 - 28 = 12645277 is a prime.
It is a Sophie Germain prime.
It is a Curzon number.
It is a junction number, because it is equal to n+sod(n) for n = 12645496 and 12645505.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (12645733) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6322766 + 6322767.
It is an arithmetic number, because the mean of its divisors is an integer number (6322767).
Almost surely, 212645533 is an apocalyptic number.
It is an amenable number.
12645533 is a deficient number, since it is larger than the sum of its proper divisors (1).
12645533 is an equidigital number, since it uses as much as digits as its factorization.
12645533 is an evil number, because the sum of its binary digits is even.
The product of its digits is 10800, while the sum is 29.
The square root of 12645533 is about 3556.0558207092.
The cubic root of 12645533 is about 232.9766411772.
The spelling of 12645533 in words is "twelve million, six hundred forty-five thousand, five hundred thirty-three".