25420523 has 2 divisors, whose sum is σ = 25420524. Its totient is φ = 25420522.

The previous prime is 25420511. The next prime is 25420531. The reversal of 25420523 is 32502452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25420523 - 2¹⁴ = 25404139 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (25420583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12710261 + 12710262.

It is an arithmetic number, because the mean of its divisors is an integer number (12710262).

Almost surely, 2^25420523 is an apocalyptic number.

25420523 is a deficient number, since it is larger than the sum of its proper divisors (1).

25420523 is an equidigital number, since it uses as much as digits as its factorization.

25420523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 25420523 is about 5041.8769322545. The cubic root of 25420523 is about 294.0321551515.

Adding to 25420523 its reverse (32502452), we get a palindrome (57922975).

The spelling of 25420523 in words is "twenty-five million, four hundred twenty thousand, five hundred twenty-three".