25700945 has 4 divisors (see below), whose sum is σ = 30841140. Its totient is φ = 20560752.

The previous prime is 25700933. The next prime is 25700981. The reversal of 25700945 is 54900752.

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 20286016 + 5414929 = 4504^2 + 2327^2 .

It is a cyclic number.

It is not a de Polignac number, because 25700945 - 2⁴ = 25700929 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2570090 + ... + 2570099.

It is an arithmetic number, because the mean of its divisors is an integer number (7710285).

Almost surely, 2^25700945 is an apocalyptic number.

It is an amenable number.

25700945 is a deficient number, since it is larger than the sum of its proper divisors (5140195).

25700945 is an equidigital number, since it uses as much as digits as its factorization.

25700945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5140194.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 25700945 is about 5069.6099455481. The cubic root of 25700945 is about 295.1093915860.

The spelling of 25700945 in words is "twenty-five million, seven hundred thousand, nine hundred forty-five".