6542940 has 24 divisors (see below), whose sum is σ = 18320400. Its totient is φ = 1744768.

The previous prime is 6542933. The next prime is 6542959. The reversal of 6542940 is 492456.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 6542898 and 6542907.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54465 + ... + 54584.

It is an arithmetic number, because the mean of its divisors is an integer number (763350).

Almost surely, 2^6542940 is an apocalyptic number.

6542940 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6542940 is an abundant number, since it is smaller than the sum of its proper divisors (11777460).

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

6542940 is a wasteful number, since it uses less digits than its factorization.

6542940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109061 (or 109059 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 6542940 is about 2557.9171214095. The cubic root of 6542940 is about 187.0356152436.

The spelling of 6542940 in words is "six million, five hundred forty-two thousand, nine hundred forty".