25540547 has 2 divisors, whose sum is σ = 25540548. Its totient is φ = 25540546.

The previous prime is 25540531. The next prime is 25540549. The reversal of 25540547 is 74504552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25540547 - 2⁴ = 25540531 is a prime.

Together with 25540549, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25540549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12770273 + 12770274.

It is an arithmetic number, because the mean of its divisors is an integer number (12770274).

Almost surely, 2^25540547 is an apocalyptic number.

25540547 is a deficient number, since it is larger than the sum of its proper divisors (1).

25540547 is an equidigital number, since it uses as much as digits as its factorization.

25540547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28000, while the sum is 32.

The square root of 25540547 is about 5053.7656257488. The cubic root of 25540547 is about 294.4941902054.

The spelling of 25540547 in words is "twenty-five million, five hundred forty thousand, five hundred forty-seven".