25554121 has 4 divisors (see below), whose sum is σ = 25628112. Its totient is φ = 25480132.

The previous prime is 25554103. The next prime is 25554157. The reversal of 25554121 is 12145552.

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 25554121 - 2¹¹ = 25552073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25554101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36475 + ... + 37168.

It is an arithmetic number, because the mean of its divisors is an integer number (6407028).

Almost surely, 2^25554121 is an apocalyptic number.

It is an amenable number.

25554121 is a deficient number, since it is larger than the sum of its proper divisors (73991).

25554121 is an equidigital number, since it uses as much as digits as its factorization.

25554121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73990.

The product of its digits is 2000, while the sum is 25.

The square root of 25554121 is about 5055.1084063549. The cubic root of 25554121 is about 294.5463524420.

Adding to 25554121 its reverse (12145552), we get a palindrome (37699673).

The spelling of 25554121 in words is "twenty-five million, five hundred fifty-four thousand, one hundred twenty-one".