25009601 has 8 divisors (see below), whose sum is σ = 26576424. Its totient is φ = 23453440.

The previous prime is 25009561. The next prime is 25009613. The reversal of 25009601 is 10690052.

It can be written as a sum of positive squares in 4 ways, for example, as 18879025 + 6130576 = 4345^2 + 2476^2 .

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 25009601 - 2¹⁴ = 24993217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25009651) 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, 2471 + ... + 7491.

It is an arithmetic number, because the mean of its divisors is an integer number (3322053).

Almost surely, 2^25009601 is an apocalyptic number.

It is an amenable number.

25009601 is a deficient number, since it is larger than the sum of its proper divisors (1566823).

25009601 is a wasteful number, since it uses less digits than its factorization.

25009601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5331.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 25009601 is about 5000.9600078385. The cubic root of 25009601 is about 292.4392003563.

Adding to 25009601 its reverse (10690052), we get a palindrome (35699653).

The spelling of 25009601 in words is "twenty-five million, nine thousand, six hundred one".