25766121 has 4 divisors (see below), whose sum is σ = 34354832. Its totient is φ = 17177412.

The previous prime is 25766099. The next prime is 25766129. The reversal of 25766121 is 12166752.

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 not a de Polignac number, because 25766121 - 2⁹ = 25765609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25766129) 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 3 ways as a sum of consecutive naturals, for example, 4294351 + ... + 4294356.

It is an arithmetic number, because the mean of its divisors is an integer number (8588708).

Almost surely, 2^25766121 is an apocalyptic number.

It is an amenable number.

25766121 is a deficient number, since it is larger than the sum of its proper divisors (8588711).

25766121 is an equidigital number, since it uses as much as digits as its factorization.

25766121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8588710.

The product of its digits is 5040, while the sum is 30.

The square root of 25766121 is about 5076.0339833378. The cubic root of 25766121 is about 295.3586407062.

The spelling of 25766121 in words is "twenty-five million, seven hundred sixty-six thousand, one hundred twenty-one".