25380001 has 4 divisors (see below), whose sum is σ = 25520404. Its totient is φ = 25239600.

The previous prime is 25379999. The next prime is 25380011. The reversal of 25380001 is 10008352.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2483776 + 22896225 = 1576^2 + 4785^2 .

It is a cyclic number.

It is not a de Polignac number, because 25380001 - 2¹ = 25379999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25380011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69930 + ... + 70291.

It is an arithmetic number, because the mean of its divisors is an integer number (6380101).

Almost surely, 2^25380001 is an apocalyptic number.

It is an amenable number.

25380001 is a deficient number, since it is larger than the sum of its proper divisors (140403).

25380001 is a wasteful number, since it uses less digits than its factorization.

25380001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140402.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 25380001 is about 5037.8567863726. The cubic root of 25380001 is about 293.8758364743.

Adding to 25380001 its reverse (10008352), we get a palindrome (35388353).

The spelling of 25380001 in words is "twenty-five million, three hundred eighty thousand, one".