6501240 has 48 divisors (see below), whose sum is σ = 21130200. Its totient is φ = 1733568.

The previous prime is 6501239. The next prime is 6501241. The reversal of 6501240 is 421056.

It is a happy number.

6501240 is a `hidden beast` number, since 650 + 12 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (6501239) and next prime (6501241).

It is a super-2 number, since 2×6501240² = 84532243075200, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6501241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8670 + ... + 9389.

Almost surely, 2^6501240 is an apocalyptic number.

6501240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6501240 is an abundant number, since it is smaller than the sum of its proper divisors (14628960).

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

6501240 is a wasteful number, since it uses less digits than its factorization.

6501240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18076 (or 18069 counting only the distinct ones).

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

The square root of 6501240 is about 2549.7529292071. The cubic root of 6501240 is about 186.6374245577.

Adding to 6501240 its reverse (421056), we get a palindrome (6922296).

The spelling of 6501240 in words is "six million, five hundred one thousand, two hundred forty".