10625209 has 6 divisors (see below), whose sum is σ = 12359994. Its totient is φ = 9107280.

The previous prime is 10625203. The next prime is 10625213. The reversal of 10625209 is 90252601.

It can be written as a sum of positive squares in only one way, i.e., 7683984 + 2941225 = 2772^2 + 1715^2 .

It is not a de Polignac number, because 10625209 - 2⁵ = 10625177 is a prime.

It is a super-2 number, since 2×10625209² = 225790132587362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10625203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 108372 + ... + 108469.

It is an arithmetic number, because the mean of its divisors is an integer number (2059999).

Almost surely, 2^10625209 is an apocalyptic number.

It is an amenable number.

10625209 is a deficient number, since it is larger than the sum of its proper divisors (1734785).

10625209 is an equidigital number, since it uses as much as digits as its factorization.

10625209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216855 (or 216848 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 10625209 is about 3259.6332615802. The cubic root of 10625209 is about 219.8429250689.

The spelling of 10625209 in words is "ten million, six hundred twenty-five thousand, two hundred nine".