4003245 has 24 divisors (see below), whose sum is σ = 7348536. Its totient is φ = 2009088.

The previous prime is 4003231. The next prime is 4003253. The reversal of 4003245 is 5423004.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1920996 + 2082249 = 1386^2 + 1443^2 .

It is not a de Polignac number, because 4003245 - 2⁵ = 4003213 is a prime.

4003245 is a lucky number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1852 + ... + 3381.

It is an arithmetic number, because the mean of its divisors is an integer number (306189).

Almost surely, 2^4003245 is an apocalyptic number.

4003245 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4003245 is a deficient number, since it is larger than the sum of its proper divisors (3345291).

4003245 is a wasteful number, since it uses less digits than its factorization.

4003245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5261 (or 5258 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 4003245 is about 2000.8110855351. The cubic root of 4003245 is about 158.7830195643.

Adding to 4003245 its reverse (5423004), we get a palindrome (9426249).

The spelling of 4003245 in words is "four million, three thousand, two hundred forty-five".