25125121 has 8 divisors (see below), whose sum is σ = 28791360. Its totient is φ = 21478128.

The previous prime is 25125083. The next prime is 25125151. The reversal of 25125121 is 12152152.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-25125121 is a prime.

It is a super-3 number, since 3×25125121³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25125151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1891 + ... + 7336.

It is an arithmetic number, because the mean of its divisors is an integer number (3598920).

Almost surely, 2^25125121 is an apocalyptic number.

It is an amenable number.

25125121 is a deficient number, since it is larger than the sum of its proper divisors (3666239).

25125121 is an equidigital number, since it uses as much as digits as its factorization.

25125121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9623.

The product of its digits is 200, while the sum is 19.

The square root of 25125121 is about 5012.4964837893. The cubic root of 25125121 is about 292.8887703074. Note that the first 3 decimals are identical.

Adding to 25125121 its reverse (12152152), we get a palindrome (37277273).

The spelling of 25125121 in words is "twenty-five million, one hundred twenty-five thousand, one hundred twenty-one".