Search a number
-
+
10621217 = 20835099
BaseRepresentation
bin101000100001…
…000100100001
3201222121120102
4220201010201
510204334332
61015352145
7156164435
oct50410441
921877512
1010621217
115aa4972
123682655
13227b559
1415a69c5
15dec062
hexa21121

10621217 has 4 divisors (see below), whose sum is σ = 10628400. Its totient is φ = 10614036.

The previous prime is 10621213. The next prime is 10621241. The reversal of 10621217 is 71212601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 71212601 = 431656107.

It is a cyclic number.

It is not a de Polignac number, because 10621217 - 22 = 10621213 is a prime.

It is a super-2 number, since 2×106212172 = 225620501122178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10621211) 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 in 3 ways as a sum of consecutive naturals, for example, 467 + ... + 4632.

It is an arithmetic number, because the mean of its divisors is an integer number (2657100).

Almost surely, 210621217 is an apocalyptic number.

It is an amenable number.

10621217 is a deficient number, since it is larger than the sum of its proper divisors (7183).

10621217 is an equidigital number, since it uses as much as digits as its factorization.

10621217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7182.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 10621217 is about 3259.0208652293. The cubic root of 10621217 is about 219.8153892062.

Adding to 10621217 its reverse (71212601), we get a palindrome (81833818).

The spelling of 10621217 in words is "ten million, six hundred twenty-one thousand, two hundred seventeen".

Divisors: 1 2083 5099 10621217