25735121 has 2 divisors, whose sum is σ = 25735122. Its totient is φ = 25735120.

The previous prime is 25735109. The next prime is 25735147. The reversal of 25735121 is 12153752.

It is an a-pointer prime, because the next prime (25735147) can be obtained adding 25735121 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24611521 + 1123600 = 4961^2 + 1060^2 .

It is a cyclic number.

It is not a de Polignac number, because 25735121 - 2²² = 21540817 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25735181) 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 as a sum of consecutive naturals, namely, 12867560 + 12867561.

It is an arithmetic number, because the mean of its divisors is an integer number (12867561).

Almost surely, 2^25735121 is an apocalyptic number.

It is an amenable number.

25735121 is a deficient number, since it is larger than the sum of its proper divisors (1).

25735121 is an equidigital number, since it uses as much as digits as its factorization.

25735121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2100, while the sum is 26.

The square root of 25735121 is about 5072.9794992686. The cubic root of 25735121 is about 295.2401415303.

Adding to 25735121 its reverse (12153752), we get a palindrome (37888873).

The spelling of 25735121 in words is "twenty-five million, seven hundred thirty-five thousand, one hundred twenty-one".