25442929 has 2 divisors, whose sum is σ = 25442930. Its totient is φ = 25442928.

The previous prime is 25442927. The next prime is 25442953. The reversal of 25442929 is 92924452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24770529 + 672400 = 4977^2 + 820^2 .

It is a cyclic number.

It is not a de Polignac number, because 25442929 - 2¹ = 25442927 is a prime.

Together with 25442927, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25442927) 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, 12721464 + 12721465.

It is an arithmetic number, because the mean of its divisors is an integer number (12721465).

Almost surely, 2^25442929 is an apocalyptic number.

It is an amenable number.

25442929 is a deficient number, since it is larger than the sum of its proper divisors (1).

25442929 is an equidigital number, since it uses as much as digits as its factorization.

25442929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 37.

The square root of 25442929 is about 5044.0984328223. The cubic root of 25442929 is about 294.1185177833.

The spelling of 25442929 in words is "twenty-five million, four hundred forty-two thousand, nine hundred twenty-nine".