25870547 has 2 divisors, whose sum is σ = 25870548. Its totient is φ = 25870546.

The previous prime is 25870529. The next prime is 25870553. The reversal of 25870547 is 74507852.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25870547 - 2¹⁴ = 25854163 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 25870547.

It is not a weakly prime, because it can be changed into another prime (25870577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12935273 + 12935274.

It is an arithmetic number, because the mean of its divisors is an integer number (12935274).

Almost surely, 2^25870547 is an apocalyptic number.

25870547 is a deficient number, since it is larger than the sum of its proper divisors (1).

25870547 is an equidigital number, since it uses as much as digits as its factorization.

25870547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78400, while the sum is 38.

The square root of 25870547 is about 5086.3097624899. The cubic root of 25870547 is about 295.7571167717.

The spelling of 25870547 in words is "twenty-five million, eight hundred seventy thousand, five hundred forty-seven".