6542740 has 24 divisors (see below), whose sum is σ = 13801032. Its totient is φ = 2605440.

The previous prime is 6542737. The next prime is 6542743. The reversal of 6542740 is 472456.

It is an interprime number because it is at equal distance from previous prime (6542737) and next prime (6542743).

It can be written as a sum of positive squares in 4 ways, for example, as 944784 + 5597956 = 972^2 + 2366^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6542699 and 6542708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6542743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4950 + ... + 6130.

It is an arithmetic number, because the mean of its divisors is an integer number (575043).

Almost surely, 2^6542740 is an apocalyptic number.

It is an amenable number.

6542740 is an abundant number, since it is smaller than the sum of its proper divisors (7258292).

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

6542740 is a wasteful number, since it uses less digits than its factorization.

6542740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467 (or 1465 counting only the distinct ones).

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

The square root of 6542740 is about 2557.8780268027. The cubic root of 6542740 is about 187.0337094997.

The spelling of 6542740 in words is "six million, five hundred forty-two thousand, seven hundred forty".