25171011 has 6 divisors (see below), whose sum is σ = 36358140. Its totient is φ = 16780668.

The previous prime is 25171009. The next prime is 25171021. The reversal of 25171011 is 11017152.

It is a happy number.

It is not a de Polignac number, because 25171011 - 2¹ = 25171009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25171021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1398381 + ... + 1398398.

It is an arithmetic number, because the mean of its divisors is an integer number (6059690).

Almost surely, 2^25171011 is an apocalyptic number.

25171011 is a deficient number, since it is larger than the sum of its proper divisors (11187129).

25171011 is a wasteful number, since it uses less digits than its factorization.

25171011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2796785 (or 2796782 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 18.

The square root of 25171011 is about 5017.0719548358. The cubic root of 25171011 is about 293.0669782852.

Adding to 25171011 its reverse (11017152), we get a palindrome (36188163).

The spelling of 25171011 in words is "twenty-five million, one hundred seventy-one thousand, eleven".