10259209 has 3 divisors (see below), whose sum is σ = 10262413. Its totient is φ = 10256006.

The previous prime is 10259203. The next prime is 10259237. The reversal of 10259209 is 90295201.

The square root of 10259209 is 3203.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 90295201 = 19 ⋅4752379.

It is not a de Polignac number, because 10259209 - 2¹⁵ = 10226441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10259203) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1602 + ... + 4804.

Almost surely, 2^10259209 is an apocalyptic number.

10259209 is the 3203-rd square number.

10259209 is the 1602-nd centered octagonal number.

It is an amenable number.

10259209 is a deficient number, since it is larger than the sum of its proper divisors (3204).

10259209 is an frugal number, since it uses more digits than its factorization.

10259209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6406 (or 3203 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 28.

The cubic root of 10259209 is about 217.2891090109.

The spelling of 10259209 in words is "ten million, two hundred fifty-nine thousand, two hundred nine".