4081025 has 24 divisors (see below), whose sum is σ = 5650680. Its totient is φ = 2903040.

The previous prime is 4081019. The next prime is 4081039. The reversal of 4081025 is 5201804.

It can be written as a sum of positive squares in 12 ways, for example, as 2660161 + 1420864 = 1631^2 + 1192^2 .

It is not a de Polignac number, because 4081025 - 2¹⁰ = 4080001 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4080988 and 4081006.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9209 + ... + 9641.

It is an arithmetic number, because the mean of its divisors is an integer number (235445).

Almost surely, 2^4081025 is an apocalyptic number.

It is an amenable number.

4081025 is a deficient number, since it is larger than the sum of its proper divisors (1569655).

4081025 is a wasteful number, since it uses less digits than its factorization.

4081025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485 (or 480 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 4081025 is about 2020.1546970467. The cubic root of 4081025 is about 159.8047749125.

Adding to 4081025 its reverse (5201804), we get a palindrome (9282829).

The spelling of 4081025 in words is "four million, eighty-one thousand, twenty-five".