25305149 has 2 divisors, whose sum is σ = 25305150. Its totient is φ = 25305148.

The previous prime is 25305109. The next prime is 25305157. The reversal of 25305149 is 94150352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17222500 + 8082649 = 4150^2 + 2843^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25305149 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25305109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12652574 + 12652575.

It is an arithmetic number, because the mean of its divisors is an integer number (12652575).

Almost surely, 2^25305149 is an apocalyptic number.

It is an amenable number.

25305149 is a deficient number, since it is larger than the sum of its proper divisors (1).

25305149 is an equidigital number, since it uses as much as digits as its factorization.

25305149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 25305149 is about 5030.4223480738. The cubic root of 25305149 is about 293.5866474301.

The spelling of 25305149 in words is "twenty-five million, three hundred five thousand, one hundred forty-nine".