25442969 has 2 divisors, whose sum is σ = 25442970. Its totient is φ = 25442968.

The previous prime is 25442953. The next prime is 25442981. The reversal of 25442969 is 96924452.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13801225 + 11641744 = 3715^2 + 3412^2 .

It is a cyclic number.

It is not a de Polignac number, because 25442969 - 2⁴ = 25442953 is a prime.

It is a super-2 number, since 2×25442969² = 1294689343069922, which contains 22 as substring.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (25442929) 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, 12721484 + 12721485.

It is an arithmetic number, because the mean of its divisors is an integer number (12721485).

Almost surely, 2^25442969 is an apocalyptic number.

It is an amenable number.

25442969 is a deficient number, since it is larger than the sum of its proper divisors (1).

25442969 is an equidigital number, since it uses as much as digits as its factorization.

25442969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 41.

The square root of 25442969 is about 5044.1023978504. The cubic root of 25442969 is about 294.1186719156.

The spelling of 25442969 in words is "twenty-five million, four hundred forty-two thousand, nine hundred sixty-nine".