25312481 has 2 divisors, whose sum is σ = 25312482. Its totient is φ = 25312480.

The previous prime is 25312451. The next prime is 25312487. The reversal of 25312481 is 18421352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25000000 + 312481 = 5000^2 + 559^2 .

It is a cyclic number.

It is not a de Polignac number, because 25312481 - 2¹⁴ = 25296097 is a prime.

It is a super-2 number, since 2×25312481² = 1281443388750722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25312481.

It is not a weakly prime, because it can be changed into another prime (25312487) 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 as a sum of consecutive naturals, namely, 12656240 + 12656241.

It is an arithmetic number, because the mean of its divisors is an integer number (12656241).

Almost surely, 2^25312481 is an apocalyptic number.

It is an amenable number.

25312481 is a deficient number, since it is larger than the sum of its proper divisors (1).

25312481 is an equidigital number, since it uses as much as digits as its factorization.

25312481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 26.

The square root of 25312481 is about 5031.1510611390. The cubic root of 25312481 is about 293.6149996235.

It can be divided in two parts, 25 and 312481, that multiplied together give a square (7812025 = 2795²).

The spelling of 25312481 in words is "twenty-five million, three hundred twelve thousand, four hundred eighty-one".