25685461 has 2 divisors, whose sum is σ = 25685462. Its totient is φ = 25685460.

The previous prime is 25685431. The next prime is 25685477. The reversal of 25685461 is 16458652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17901361 + 7784100 = 4231^2 + 2790^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25685461 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25685461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25685431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12842730 + 12842731.

It is an arithmetic number, because the mean of its divisors is an integer number (12842731).

Almost surely, 2^25685461 is an apocalyptic number.

It is an amenable number.

25685461 is a deficient number, since it is larger than the sum of its proper divisors (1).

25685461 is an equidigital number, since it uses as much as digits as its factorization.

25685461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57600, while the sum is 37.

The square root of 25685461 is about 5068.0825762807. The cubic root of 25685461 is about 295.0501150136.

The spelling of 25685461 in words is "twenty-five million, six hundred eighty-five thousand, four hundred sixty-one".