25198101 has 8 divisors (see below), whose sum is σ = 37330560. Its totient is φ = 16798716.

The previous prime is 25198093. The next prime is 25198109. The reversal of 25198101 is 10189152.

It is an interprime number because it is at equal distance from previous prime (25198093) and next prime (25198109).

It is not a de Polignac number, because 25198101 - 2³ = 25198093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 933263 = 25198101 / (2 + 5 + 1 + 9 + 8 + 1 + 0 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25198109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 466605 + ... + 466658.

It is an arithmetic number, because the mean of its divisors is an integer number (4666320).

Almost surely, 2^25198101 is an apocalyptic number.

It is an amenable number.

25198101 is a deficient number, since it is larger than the sum of its proper divisors (12132459).

25198101 is an equidigital number, since it uses as much as digits as its factorization.

25198101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933272 (or 933266 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 25198101 is about 5019.7710107135. The cubic root of 25198101 is about 293.1720772023.

The spelling of 25198101 in words is "twenty-five million, one hundred ninety-eight thousand, one hundred one".