25271001 has 16 divisors (see below), whose sum is σ = 42787200. Its totient is φ = 14440464.

The previous prime is 25270991. The next prime is 25271023. The reversal of 25271001 is 10017252.

It is not a de Polignac number, because 25271001 - 2⁷ = 25270873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25271801) 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, 66666 + ... + 67043.

It is an arithmetic number, because the mean of its divisors is an integer number (2674200).

Almost surely, 2^25271001 is an apocalyptic number.

25271001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25271001 is a deficient number, since it is larger than the sum of its proper divisors (17516199).

25271001 is a wasteful number, since it uses less digits than its factorization.

25271001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133725 (or 133719 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 25271001 is about 5027.0270538361. The cubic root of 25271001 is about 293.4545279445.

Adding to 25271001 its reverse (10017252), we get a palindrome (35288253).

It can be divided in two parts, 252 and 71001, that added together give a triangular number (71253 = T₃₇₇).

The spelling of 25271001 in words is "twenty-five million, two hundred seventy-one thousand, one".