25864547 has 2 divisors, whose sum is σ = 25864548. Its totient is φ = 25864546.

The previous prime is 25864537. The next prime is 25864561. The reversal of 25864547 is 74546852.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25864547 - 2⁶ = 25864483 is a prime.

It is not a weakly prime, because it can be changed into another prime (25864507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12932273 + 12932274.

It is an arithmetic number, because the mean of its divisors is an integer number (12932274).

Almost surely, 2^25864547 is an apocalyptic number.

25864547 is a deficient number, since it is larger than the sum of its proper divisors (1).

25864547 is an equidigital number, since it uses as much as digits as its factorization.

25864547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 268800, while the sum is 41.

The square root of 25864547 is about 5085.7199097080. The cubic root of 25864547 is about 295.7342506155.

The spelling of 25864547 in words is "twenty-five million, eight hundred sixty-four thousand, five hundred forty-seven".