4102640 has 20 divisors (see below), whose sum is σ = 9538824. Its totient is φ = 1641024.

The previous prime is 4102603. The next prime is 4102649. The reversal of 4102640 is 462014.

It is a tau number, because it is divible by the number of its divisors (20).

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25562 + ... + 25721.

Almost surely, 2^4102640 is an apocalyptic number.

4102640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4102640 is an abundant number, since it is smaller than the sum of its proper divisors (5436184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4102640 is a wasteful number, since it uses less digits than its factorization.

4102640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51296 (or 51290 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 4102640 is about 2025.4974697590. The cubic root of 4102640 is about 160.0864116563.

Adding to 4102640 its reverse (462014), we get a palindrome (4564654).

The spelling of 4102640 in words is "four million, one hundred two thousand, six hundred forty".