25506049 has 2 divisors, whose sum is σ = 25506050. Its totient is φ = 25506048.

The previous prime is 25505989. The next prime is 25506067. The reversal of 25506049 is 94060552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22733824 + 2772225 = 4768^2 + 1665^2 .

It is a cyclic number.

It is not a de Polignac number, because 25506049 - 2²¹ = 23408897 is a prime.

It is equal to p_1595515 and since 25506049 and 1595515 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25506049.

It is not a weakly prime, because it can be changed into another prime (25506079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12753024 + 12753025.

It is an arithmetic number, because the mean of its divisors is an integer number (12753025).

Almost surely, 2^25506049 is an apocalyptic number.

It is an amenable number.

25506049 is a deficient number, since it is larger than the sum of its proper divisors (1).

25506049 is an equidigital number, since it uses as much as digits as its factorization.

25506049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 25506049 is about 5050.3513739145. The cubic root of 25506049 is about 294.3615378887.

The spelling of 25506049 in words is "twenty-five million, five hundred six thousand, forty-nine".