25512709 has 2 divisors, whose sum is σ = 25512710. Its totient is φ = 25512708.

The previous prime is 25512679. The next prime is 25512713. The reversal of 25512709 is 90721552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21883684 + 3629025 = 4678^2 + 1905^2 .

It is a cyclic number.

It is not a de Polignac number, because 25512709 - 2⁷ = 25512581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25512719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12756354 + 12756355.

It is an arithmetic number, because the mean of its divisors is an integer number (12756355).

Almost surely, 2^25512709 is an apocalyptic number.

It is an amenable number.

25512709 is a deficient number, since it is larger than the sum of its proper divisors (1).

25512709 is an equidigital number, since it uses as much as digits as its factorization.

25512709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 25512709 is about 5051.0106909410. The cubic root of 25512709 is about 294.3871563506.

The spelling of 25512709 in words is "twenty-five million, five hundred twelve thousand, seven hundred nine".