6510042 has 108 divisors (see below), whose sum is σ = 18330858. Its totient is φ = 1663200.

The previous prime is 6510037. The next prime is 6510047. The reversal of 6510042 is 2400156.

6510042 = T₉₈ + T₉₉ + ... + T₃₄₁.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6510037) and next prime (6510047).

It can be written as a sum of positive squares in only one way, i.e., 6456681 + 53361 = 2541^2 + 231^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 6509997 and 6510024.

It is not an unprimeable number, because it can be changed into a prime (6510047) 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 53 ways as a sum of consecutive naturals, for example, 106692 + ... + 106752.

Almost surely, 2^6510042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6510042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9165429).

6510042 is an abundant number, since it is smaller than the sum of its proper divisors (11820816).

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

6510042 is a wasteful number, since it uses less digits than its factorization.

6510042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 6510042 is about 2551.4783949703. The cubic root of 6510042 is about 186.7216157675.

Adding to 6510042 its reverse (2400156), we get a palindrome (8910198).

The spelling of 6510042 in words is "six million, five hundred ten thousand, forty-two".