25642523 has 2 divisors, whose sum is σ = 25642524. Its totient is φ = 25642522.

The previous prime is 25642501. The next prime is 25642541. The reversal of 25642523 is 32524652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25642523 - 2⁶ = 25642459 is a prime.

It is not a weakly prime, because it can be changed into another prime (25642223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12821261 + 12821262.

It is an arithmetic number, because the mean of its divisors is an integer number (12821262).

Almost surely, 2^25642523 is an apocalyptic number.

25642523 is a deficient number, since it is larger than the sum of its proper divisors (1).

25642523 is an equidigital number, since it uses as much as digits as its factorization.

25642523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 29.

The square root of 25642523 is about 5063.8446856119. The cubic root of 25642523 is about 294.8856130301.

The spelling of 25642523 in words is "twenty-five million, six hundred forty-two thousand, five hundred twenty-three".