4391025 has 24 divisors (see below), whose sum is σ = 7332864. Its totient is φ = 2318400.

The previous prime is 4391017. The next prime is 4391027. The reversal of 4391025 is 5201934.

It is not a de Polignac number, because 4391025 - 2³ = 4391017 is a prime.

It is a super-2 number, since 2×4391025² = 38562201101250, which contains 22 as substring.

It is a nialpdrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 4390986 and 4391004.

It is not an unprimeable number, because it can be changed into a prime (4391027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9295 + ... + 9755.

It is an arithmetic number, because the mean of its divisors is an integer number (305536).

Almost surely, 2^4391025 is an apocalyptic number.

It is an amenable number.

4391025 is a deficient number, since it is larger than the sum of its proper divisors (2941839).

4391025 is a wasteful number, since it uses less digits than its factorization.

4391025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601 (or 596 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 4391025 is about 2095.4772726040. The cubic root of 4391025 is about 163.7527630014.

Adding to 4391025 its reverse (5201934), we get a palindrome (9592959).

The spelling of 4391025 in words is "four million, three hundred ninety-one thousand, twenty-five".