25634123 has 2 divisors, whose sum is σ = 25634124. Its totient is φ = 25634122.

The previous prime is 25634111. The next prime is 25634131. The reversal of 25634123 is 32143652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25634123 - 2¹⁸ = 25371979 is a prime.

It is a Sophie Germain prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 25634092 and 25634101.

It is not a weakly prime, because it can be changed into another prime (25634153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12817061 + 12817062.

It is an arithmetic number, because the mean of its divisors is an integer number (12817062).

Almost surely, 2^25634123 is an apocalyptic number.

25634123 is a deficient number, since it is larger than the sum of its proper divisors (1).

25634123 is an equidigital number, since it uses as much as digits as its factorization.

25634123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 26.

The square root of 25634123 is about 5063.0152083516. The cubic root of 25634123 is about 294.8534098848.

Adding to 25634123 its reverse (32143652), we get a palindrome (57777775).

The spelling of 25634123 in words is "twenty-five million, six hundred thirty-four thousand, one hundred twenty-three".