25072549 has 2 divisors, whose sum is σ = 25072550. Its totient is φ = 25072548.

The previous prime is 25072547. The next prime is 25072577. The reversal of 25072549 is 94527052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25070049 + 2500 = 5007^2 + 50^2 .

It is a cyclic number.

It is not a de Polignac number, because 25072549 - 2¹ = 25072547 is a prime.

Together with 25072547, it forms a pair of twin primes.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25072547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12536274 + 12536275.

It is an arithmetic number, because the mean of its divisors is an integer number (12536275).

Almost surely, 2^25072549 is an apocalyptic number.

It is an amenable number.

25072549 is a deficient number, since it is larger than the sum of its proper divisors (1).

25072549 is an equidigital number, since it uses as much as digits as its factorization.

25072549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 25072549 is about 5007.2496442658. The cubic root of 25072549 is about 292.6843467427.

The spelling of 25072549 in words is "twenty-five million, seventy-two thousand, five hundred forty-nine".