25917001 has 4 divisors (see below), whose sum is σ = 28273104. Its totient is φ = 23560900.

The previous prime is 25916941. The next prime is 25917011. The reversal of 25917001 is 10071952.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 25917001 - 2⁹ = 25916489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25917011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1178035 + ... + 1178056.

It is an arithmetic number, because the mean of its divisors is an integer number (7068276).

Almost surely, 2^25917001 is an apocalyptic number.

It is an amenable number.

25917001 is a deficient number, since it is larger than the sum of its proper divisors (2356103).

25917001 is a wasteful number, since it uses less digits than its factorization.

25917001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2356102.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 25917001 is about 5090.8742864070. The cubic root of 25917001 is about 295.9340346368.

Adding to 25917001 its reverse (10071952), we get a palindrome (35988953).

The spelling of 25917001 in words is "twenty-five million, nine hundred seventeen thousand, one".