25010109 has 6 divisors (see below), whose sum is σ = 36125726. Its totient is φ = 16673400.

The previous prime is 25010071. The next prime is 25010143. The reversal of 25010109 is 90101052.

It can be written as a sum of positive squares in only one way, i.e., 21483225 + 3526884 = 4635^2 + 1878^2 .

It is not a de Polignac number, because 25010109 - 2⁷ = 25009981 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25010091 and 25010100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25010509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1389442 + ... + 1389459.

Almost surely, 2^25010109 is an apocalyptic number.

It is an amenable number.

25010109 is a deficient number, since it is larger than the sum of its proper divisors (11115617).

25010109 is a wasteful number, since it uses less digits than its factorization.

25010109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2778907 (or 2778904 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 25010109 is about 5001.0107978288. The cubic root of 25010109 is about 292.4411803707.

The spelling of 25010109 in words is "twenty-five million, ten thousand, one hundred nine".