25122545 has 36 divisors (see below), whose sum is σ = 36534492. Its totient is φ = 16531200.

The previous prime is 25122533. The next prime is 25122547. The reversal of 25122545 is 54522152.

It can be written as a sum of positive squares in 6 ways, for example, as 16313521 + 8809024 = 4039^2 + 2968^2 .

It is not a de Polignac number, because 25122545 - 2⁴ = 25122529 is a prime.

It is a super-2 number, since 2×25122545² = 1262284534554050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25122547) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 411815 + ... + 411875.

It is an arithmetic number, because the mean of its divisors is an integer number (1014847).

Almost surely, 2^25122545 is an apocalyptic number.

It is an amenable number.

25122545 is a deficient number, since it is larger than the sum of its proper divisors (11411947).

25122545 is an equidigital number, since it uses as much as digits as its factorization.

25122545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162 (or 114 counting only the distinct ones).

The product of its digits is 4000, while the sum is 26.

The square root of 25122545 is about 5012.2395194164. The cubic root of 25122545 is about 292.8787603090.

Adding to 25122545 its reverse (54522152), we get a palindrome (79644697).

The spelling of 25122545 in words is "twenty-five million, one hundred twenty-two thousand, five hundred forty-five".