25678123 has 2 divisors, whose sum is σ = 25678124. Its totient is φ = 25678122.

The previous prime is 25678117. The next prime is 25678127. The reversal of 25678123 is 32187652.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25678123 - 2⁵ = 25678091 is a prime.

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

It is not a weakly prime, because it can be changed into another prime (25678127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12839061 + 12839062.

It is an arithmetic number, because the mean of its divisors is an integer number (12839062).

Almost surely, 2^25678123 is an apocalyptic number.

25678123 is a deficient number, since it is larger than the sum of its proper divisors (1).

25678123 is an equidigital number, since it uses as much as digits as its factorization.

25678123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 34.

The square root of 25678123 is about 5067.3585821412. The cubic root of 25678123 is about 295.0220150189.

The spelling of 25678123 in words is "twenty-five million, six hundred seventy-eight thousand, one hundred twenty-three".