6540426 has 40 divisors (see below), whose sum is σ = 14984640. Its totient is φ = 2131272.

The previous prime is 6540421. The next prime is 6540431. The reversal of 6540426 is 6240456.

It is a happy number.

6540426 is a `hidden beast` number, since 654 + 0 + 4 + 2 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (6540421) and next prime (6540431).

It is a super-2 number, since 2×6540426² = 85554344522952, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 6540426.

It is not an unprimeable number, because it can be changed into a prime (6540421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7185 + ... + 8043.

It is an arithmetic number, because the mean of its divisors is an integer number (374616).

Almost surely, 2^6540426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6540426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7492320).

6540426 is an abundant number, since it is smaller than the sum of its proper divisors (8444214).

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

6540426 is a wasteful number, since it uses less digits than its factorization.

6540426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920 (or 911 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 6540426 is about 2557.4256587436. The cubic root of 6540426 is about 187.0116572180.

The spelling of 6540426 in words is "six million, five hundred forty thousand, four hundred twenty-six".