25273561 has 2 divisors, whose sum is σ = 25273562. Its totient is φ = 25273560.

The previous prime is 25273531. The next prime is 25273603. The reversal of 25273561 is 16537252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14017536 + 11256025 = 3744^2 + 3355^2 .

It is a cyclic number.

It is not a de Polignac number, because 25273561 - 2¹³ = 25265369 is a prime.

It is not a weakly prime, because it can be changed into another prime (25273531) 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, 12636780 + 12636781.

It is an arithmetic number, because the mean of its divisors is an integer number (12636781).

Almost surely, 2^25273561 is an apocalyptic number.

It is an amenable number.

25273561 is a deficient number, since it is larger than the sum of its proper divisors (1).

25273561 is an equidigital number, since it uses as much as digits as its factorization.

25273561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 31.

The square root of 25273561 is about 5027.2816710425. The cubic root of 25273561 is about 293.4644367754.

The spelling of 25273561 in words is "twenty-five million, two hundred seventy-three thousand, five hundred sixty-one".