25443601 has 2 divisors, whose sum is σ = 25443602. Its totient is φ = 25443600.

The previous prime is 25443599. The next prime is 25443623. The reversal of 25443601 is 10634452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15210000 + 10233601 = 3900^2 + 3199^2 .

It is a cyclic number.

It is not a de Polignac number, because 25443601 - 2¹ = 25443599 is a prime.

Together with 25443599, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25443661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12721800 + 12721801.

It is an arithmetic number, because the mean of its divisors is an integer number (12721801).

Almost surely, 2^25443601 is an apocalyptic number.

It is an amenable number.

25443601 is a deficient number, since it is larger than the sum of its proper divisors (1).

25443601 is an equidigital number, since it uses as much as digits as its factorization.

25443601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 25443601 is about 5044.1650448811. The cubic root of 25443601 is about 294.1211071852.

The spelling of 25443601 in words is "twenty-five million, four hundred forty-three thousand, six hundred one".