25778527 has 2 divisors, whose sum is σ = 25778528. Its totient is φ = 25778526.

The previous prime is 25778507. The next prime is 25778549. The reversal of 25778527 is 72587752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25778527 - 2⁷ = 25778399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25778507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12889263 + 12889264.

It is an arithmetic number, because the mean of its divisors is an integer number (12889264).

Almost surely, 2^25778527 is an apocalyptic number.

25778527 is a deficient number, since it is larger than the sum of its proper divisors (1).

25778527 is an equidigital number, since it uses as much as digits as its factorization.

25778527 is an evil number, because the sum of its binary digits is even.

The product of its digits is 274400, while the sum is 43.

The square root of 25778527 is about 5077.2558533129. The cubic root of 25778527 is about 295.4060366823.

The spelling of 25778527 in words is "twenty-five million, seven hundred seventy-eight thousand, five hundred twenty-seven".