25116121 has 4 divisors (see below), whose sum is σ = 25243812. Its totient is φ = 24988432.

The previous prime is 25116109. The next prime is 25116127. The reversal of 25116121 is 12161152.

25116121 is nontrivially palindromic in base 8.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21160000 + 3956121 = 4600^2 + 1989^2 .

It is a cyclic number.

It is not a de Polignac number, because 25116121 - 2¹¹ = 25114073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25116127) 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, 63550 + ... + 63943.

It is an arithmetic number, because the mean of its divisors is an integer number (6310953).

Almost surely, 2^25116121 is an apocalyptic number.

It is an amenable number.

25116121 is a deficient number, since it is larger than the sum of its proper divisors (127691).

25116121 is a wasteful number, since it uses less digits than its factorization.

25116121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127690.

The product of its digits is 120, while the sum is 19.

The square root of 25116121 is about 5011.5986471385. The cubic root of 25116121 is about 292.8537945058.

Adding to 25116121 its reverse (12161152), we get a palindrome (37277273).

The spelling of 25116121 in words is "twenty-five million, one hundred sixteen thousand, one hundred twenty-one".