25211001 has 16 divisors (see below), whose sum is σ = 34384896. Its totient is φ = 16426896.

The previous prime is 25210993. The next prime is 25211009. The reversal of 25211001 is 10011252.

It is an interprime number because it is at equal distance from previous prime (25210993) and next prime (25211009).

It is not a de Polignac number, because 25211001 - 2³ = 25210993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25211009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25156 + ... + 26138.

It is an arithmetic number, because the mean of its divisors is an integer number (2149056).

Almost surely, 2^25211001 is an apocalyptic number.

It is an amenable number.

25211001 is a deficient number, since it is larger than the sum of its proper divisors (9173895).

25211001 is a wasteful number, since it uses less digits than its factorization.

25211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 25211001 is about 5021.0557654740. The cubic root of 25211001 is about 293.2220978315. Note that the first 3 decimals are identical.

Adding to 25211001 its reverse (10011252), we get a palindrome (35222253).

The spelling of 25211001 in words is "twenty-five million, two hundred eleven thousand, one".