25437161 has 4 divisors (see below), whose sum is σ = 25452372. Its totient is φ = 25421952.

The previous prime is 25437157. The next prime is 25437163. The reversal of 25437161 is 16173452.

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 8880400 + 16556761 = 2980^2 + 4069^2 .

It is a cyclic number.

It is not a de Polignac number, because 25437161 - 2² = 25437157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25437163) 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, 4736 + ... + 8561.

It is an arithmetic number, because the mean of its divisors is an integer number (6363093).

Almost surely, 2^25437161 is an apocalyptic number.

It is an amenable number.

25437161 is a deficient number, since it is larger than the sum of its proper divisors (15211).

25437161 is a wasteful number, since it uses less digits than its factorization.

25437161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15210.

The product of its digits is 5040, while the sum is 29.

The square root of 25437161 is about 5043.5266431338. The cubic root of 25437161 is about 294.0962902085.

The spelling of 25437161 in words is "twenty-five million, four hundred thirty-seven thousand, one hundred sixty-one".