25148121 has 4 divisors (see below), whose sum is σ = 33530832. Its totient is φ = 16765412.

The previous prime is 25148069. The next prime is 25148141. The reversal of 25148121 is 12184152.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25148121 - 2¹⁵ = 25115353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25148091 and 25148100.

It is not an unprimeable number, because it can be changed into a prime (25148141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4191351 + ... + 4191356.

It is an arithmetic number, because the mean of its divisors is an integer number (8382708).

Almost surely, 2^25148121 is an apocalyptic number.

It is an amenable number.

25148121 is a deficient number, since it is larger than the sum of its proper divisors (8382711).

25148121 is an equidigital number, since it uses as much as digits as its factorization.

25148121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8382710.

The product of its digits is 640, while the sum is 24.

The square root of 25148121 is about 5014.7902249247. The cubic root of 25148121 is about 292.9781149810.

The spelling of 25148121 in words is "twenty-five million, one hundred forty-eight thousand, one hundred twenty-one".