25250545 has 4 divisors (see below), whose sum is σ = 30300660. Its totient is φ = 20200432.

The previous prime is 25250543. The next prime is 25250579. The reversal of 25250545 is 54505252.

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 2934369 + 22316176 = 1713^2 + 4724^2 .

It is a cyclic number.

It is not a de Polignac number, because 25250545 - 2¹ = 25250543 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (25250543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2525050 + ... + 2525059.

It is an arithmetic number, because the mean of its divisors is an integer number (7575165).

Almost surely, 2^25250545 is an apocalyptic number.

It is an amenable number.

25250545 is a deficient number, since it is larger than the sum of its proper divisors (5050115).

25250545 is an equidigital number, since it uses as much as digits as its factorization.

25250545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5050114.

The product of its (nonzero) digits is 10000, while the sum is 28.

The square root of 25250545 is about 5024.9920397947. The cubic root of 25250545 is about 293.3753261449.

Adding to 25250545 its reverse (54505252), we get a palindrome (79755797).

The spelling of 25250545 in words is "twenty-five million, two hundred fifty thousand, five hundred forty-five".