25571121 has 4 divisors (see below), whose sum is σ = 34094832. Its totient is φ = 17047412.

The previous prime is 25571083. The next prime is 25571123. The reversal of 25571121 is 12117552.

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 25571121 - 2⁶ = 25571057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25571091 and 25571100.

It is not an unprimeable number, because it can be changed into a prime (25571123) 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, 4261851 + ... + 4261856.

It is an arithmetic number, because the mean of its divisors is an integer number (8523708).

Almost surely, 2^25571121 is an apocalyptic number.

It is an amenable number.

25571121 is a deficient number, since it is larger than the sum of its proper divisors (8523711).

25571121 is an equidigital number, since it uses as much as digits as its factorization.

25571121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8523710.

The product of its digits is 700, while the sum is 24.

The square root of 25571121 is about 5056.7895941991. The cubic root of 25571121 is about 294.6116540820.

Adding to 25571121 its reverse (12117552), we get a palindrome (37688673).

The spelling of 25571121 in words is "twenty-five million, five hundred seventy-one thousand, one hundred twenty-one".