25144985 has 4 divisors (see below), whose sum is σ = 30173988. Its totient is φ = 20115984.

The previous prime is 25144969. The next prime is 25144991. The reversal of 25144985 is 58944152.

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 18939904 + 6205081 = 4352^2 + 2491^2 .

It is a cyclic number.

It is not a de Polignac number, because 25144985 - 2⁴ = 25144969 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2514494 + ... + 2514503.

It is an arithmetic number, because the mean of its divisors is an integer number (7543497).

Almost surely, 2^25144985 is an apocalyptic number.

It is an amenable number.

25144985 is a deficient number, since it is larger than the sum of its proper divisors (5029003).

25144985 is an equidigital number, since it uses as much as digits as its factorization.

25144985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5029002.

The product of its digits is 57600, while the sum is 38.

The square root of 25144985 is about 5014.4775400833. The cubic root of 25144985 is about 292.9659362373.

The spelling of 25144985 in words is "twenty-five million, one hundred forty-four thousand, nine hundred eighty-five".