6501040 has 160 divisors (see below), whose sum is σ = 19998720. Its totient is φ = 1907712.

The previous prime is 6501031. The next prime is 6501049. The reversal of 6501040 is 401056.

It is an interprime number because it is at equal distance from previous prime (6501031) and next prime (6501049).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6501049) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138297 + ... + 138343.

It is an arithmetic number, because the mean of its divisors is an integer number (124992).

Almost surely, 2^6501040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6501040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9999360).

6501040 is an abundant number, since it is smaller than the sum of its proper divisors (13497680).

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

6501040 is a wasteful number, since it uses less digits than its factorization.

6501040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 93 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 6501040 is about 2549.7137094192. The cubic root of 6501040 is about 186.6355106731.

Adding to 6501040 its sum of digits (16), we get a palindrome (6501056).

Adding to 6501040 its reverse (401056), we get a palindrome (6902096).

The spelling of 6501040 in words is "six million, five hundred one thousand, forty".