6742540 has 48 divisors (see below), whose sum is σ = 17140032. Its totient is φ = 2174976.

The previous prime is 6742517. The next prime is 6742553. The reversal of 6742540 is 452476.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 6742499 and 6742508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 964 + ... + 3796.

It is an arithmetic number, because the mean of its divisors is an integer number (357084).

Almost surely, 2^6742540 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 6742540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8570016).

6742540 is an abundant number, since it is smaller than the sum of its proper divisors (10397492).

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

6742540 is a wasteful number, since it uses less digits than its factorization.

6742540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2866 (or 2864 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 6742540 is about 2596.6401367922. The cubic root of 6742540 is about 188.9185095160.

Subtracting from 6742540 its reverse (452476), we obtain a square (6290064 = 2508²).

The spelling of 6742540 in words is "six million, seven hundred forty-two thousand, five hundred forty".