4102639 has 4 divisors (see below), whose sum is σ = 4107600. Its totient is φ = 4097680.

The previous prime is 4102603. The next prime is 4102649. The reversal of 4102639 is 9362014.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9362014 = 2 ⋅4681007.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4102639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4102649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 907 + ... + 3004.

It is an arithmetic number, because the mean of its divisors is an integer number (1026900).

Almost surely, 2^4102639 is an apocalyptic number.

4102639 is a deficient number, since it is larger than the sum of its proper divisors (4961).

4102639 is a wasteful number, since it uses less digits than its factorization.

4102639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4960.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 4102639 is about 2025.4972229060. The cubic root of 4102639 is about 160.0863986496.

The spelling of 4102639 in words is "four million, one hundred two thousand, six hundred thirty-nine".