25430705 has 4 divisors (see below), whose sum is σ = 30516852. Its totient is φ = 20344560.

The previous prime is 25430687. The next prime is 25430707. The reversal of 25430705 is 50703452.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19651489 + 5779216 = 4433^2 + 2404^2 .

It is not a de Polignac number, because 25430705 - 2⁶ = 25430641 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25430707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2543066 + ... + 2543075.

It is an arithmetic number, because the mean of its divisors is an integer number (7629213).

Almost surely, 2^25430705 is an apocalyptic number.

It is an amenable number.

25430705 is a deficient number, since it is larger than the sum of its proper divisors (5086147).

25430705 is an equidigital number, since it uses as much as digits as its factorization.

25430705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5086146.

The product of its (nonzero) digits is 4200, while the sum is 26.

The square root of 25430705 is about 5042.8865741755. The cubic root of 25430705 is about 294.0714073700.

The spelling of 25430705 in words is "twenty-five million, four hundred thirty thousand, seven hundred five".