10206505 has 8 divisors (see below), whose sum is σ = 12285000. Its totient is φ = 8140416.

The previous prime is 10206491. The next prime is 10206509. The reversal of 10206505 is 50560201.

It is a happy number.

10206505 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1272384 + 8934121 = 1128^2 + 2989^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10206505 - 2¹⁹ = 9682217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10206509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1180 + ... + 4669.

It is an arithmetic number, because the mean of its divisors is an integer number (1535625).

Almost surely, 2^10206505 is an apocalyptic number.

It is an amenable number.

10206505 is a deficient number, since it is larger than the sum of its proper divisors (2078495).

10206505 is an equidigital number, since it uses as much as digits as its factorization.

10206505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6203.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 10206505 is about 3194.7621194699. The cubic root of 10206505 is about 216.9163813824.

Adding to 10206505 its reverse (50560201), we get a palindrome (60766706).

The spelling of 10206505 in words is "ten million, two hundred six thousand, five hundred five".