25407461 has 2 divisors, whose sum is σ = 25407462. Its totient is φ = 25407460.

The previous prime is 25407449. The next prime is 25407463. The reversal of 25407461 is 16470452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15358561 + 10048900 = 3919^2 + 3170^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25407461 is a prime.

It is a Sophie Germain prime.

Together with 25407463, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25407463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12703730 + 12703731.

It is an arithmetic number, because the mean of its divisors is an integer number (12703731).

Almost surely, 2^25407461 is an apocalyptic number.

It is an amenable number.

25407461 is a deficient number, since it is larger than the sum of its proper divisors (1).

25407461 is an equidigital number, since it uses as much as digits as its factorization.

25407461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 25407461 is about 5040.5814148767. The cubic root of 25407461 is about 293.9817850100.

It can be divided in two parts, 2540 and 7461, that added together give a palindrome (10001).

The spelling of 25407461 in words is "twenty-five million, four hundred seven thousand, four hundred sixty-one".