25650001 has 8 divisors (see below), whose sum is σ = 27909224. Its totient is φ = 23431680.

The previous prime is 25649993. The next prime is 25650011. The reversal of 25650001 is 10005652.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1404225 + 24245776 = 1185^2 + 4924^2 .

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 25650001 - 2³ = 25649993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25650011) 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, 8910 + ... + 11431.

It is an arithmetic number, because the mean of its divisors is an integer number (3488653).

Almost surely, 2^25650001 is an apocalyptic number.

It is an amenable number.

25650001 is a deficient number, since it is larger than the sum of its proper divisors (2259223).

25650001 is a wasteful number, since it uses less digits than its factorization.

25650001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20451.

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

The square root of 25650001 is about 5064.5830035651. The cubic root of 25650001 is about 294.9142755800.

Adding to 25650001 its reverse (10005652), we get a palindrome (35655653).

The spelling of 25650001 in words is "twenty-five million, six hundred fifty thousand, one".