4040025 has 48 divisors (see below), whose sum is σ = 7499520. Its totient is φ = 1902400.

The previous prime is 4040021. The next prime is 4040041. The reversal of 4040025 is 5200404.

It is not a de Polignac number, because 4040025 - 2² = 4040021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 4039986 and 4040013.

It is not an unprimeable number, because it can be changed into a prime (4040021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 48634 + ... + 48716.

It is an arithmetic number, because the mean of its divisors is an integer number (156240).

Almost surely, 2^4040025 is an apocalyptic number.

It is an amenable number.

4040025 is a deficient number, since it is larger than the sum of its proper divisors (3459495).

4040025 is a wasteful number, since it uses less digits than its factorization.

4040025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166 (or 161 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 4040025 is about 2009.9813431970. The cubic root of 4040025 is about 159.2678133571.

Adding to 4040025 its reverse (5200404), we get a palindrome (9240429).

The spelling of 4040025 in words is "four million, forty thousand, twenty-five".