25449943 has 2 divisors, whose sum is σ = 25449944. Its totient is φ = 25449942.

The previous prime is 25449923. The next prime is 25449947. The reversal of 25449943 is 34994452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25449943 - 2¹⁷ = 25318871 is a prime.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 25449896 and 25449905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25449947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12724971 + 12724972.

It is an arithmetic number, because the mean of its divisors is an integer number (12724972).

Almost surely, 2^25449943 is an apocalyptic number.

25449943 is a deficient number, since it is larger than the sum of its proper divisors (1).

25449943 is an equidigital number, since it uses as much as digits as its factorization.

25449943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 40.

The square root of 25449943 is about 5044.7936528663. The cubic root of 25449943 is about 294.1455424201.

The spelling of 25449943 in words is "twenty-five million, four hundred forty-nine thousand, nine hundred forty-three".