6440102 has 4 divisors (see below), whose sum is σ = 9660156. Its totient is φ = 3220050.

The previous prime is 6440099. The next prime is 6440113. The reversal of 6440102 is 2010446.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2010446 = 2 ⋅1005223.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1610024 + ... + 1610027.

It is an arithmetic number, because the mean of its divisors is an integer number (2415039).

Almost surely, 2^6440102 is an apocalyptic number.

6440102 is a deficient number, since it is larger than the sum of its proper divisors (3220054).

6440102 is a wasteful number, since it uses less digits than its factorization.

6440102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3220053.

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

The square root of 6440102 is about 2537.7356048257. The cubic root of 6440102 is about 186.0505316130.

Adding to 6440102 its reverse (2010446), we get a palindrome (8450548).

The spelling of 6440102 in words is "six million, four hundred forty thousand, one hundred two".