2002539 has 16 divisors (see below), whose sum is σ = 3329280. Its totient is φ = 1040160.

The previous prime is 2002531. The next prime is 2002547. The reversal of 2002539 is 9352002.

2002539 is nontrivially palindromic in base 9.

It is an interprime number because it is at equal distance from previous prime (2002531) and next prime (2002547).

It is not a de Polignac number, because 2002539 - 2³ = 2002531 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (2002531) 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 15 ways as a sum of consecutive naturals, for example, 4104 + ... + 4565.

It is an arithmetic number, because the mean of its divisors is an integer number (208080).

2^2002539 is an apocalyptic number.

2002539 is a deficient number, since it is larger than the sum of its proper divisors (1326741).

2002539 is a wasteful number, since it uses less digits than its factorization.

2002539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8690.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 2002539 is about 1415.1109497138. The cubic root of 2002539 is about 126.0453981031.

2002539 divided by its sum of digits (21) gives a palindrome (95359).

The spelling of 2002539 in words is "two million, two thousand, five hundred thirty-nine".