25067521 has 2 divisors, whose sum is σ = 25067522. Its totient is φ = 25067520.

The previous prime is 25067501. The next prime is 25067531. The reversal of 25067521 is 12576052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13068225 + 11999296 = 3615^2 + 3464^2 .

It is a cyclic number.

It is not a de Polignac number, because 25067521 - 2⁵ = 25067489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25067521.

It is not a weakly prime, because it can be changed into another prime (25067501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12533760 + 12533761.

It is an arithmetic number, because the mean of its divisors is an integer number (12533761).

It is a Proth number, since it is equal to 765 ⋅ 2¹⁵ + 1 and 765 < 2¹⁵.

Almost surely, 2^25067521 is an apocalyptic number.

It is an amenable number.

25067521 is a deficient number, since it is larger than the sum of its proper divisors (1).

25067521 is an equidigital number, since it uses as much as digits as its factorization.

25067521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 25067521 is about 5006.7475470609. The cubic root of 25067521 is about 292.6647806524.

The spelling of 25067521 in words is "twenty-five million, sixty-seven thousand, five hundred twenty-one".