6540442 has 8 divisors (see below), whose sum is σ = 10127232. Its totient is φ = 3164700.

The previous prime is 6540433. The next prime is 6540451. The reversal of 6540442 is 2440456.

It is an interprime number because it is at equal distance from previous prime (6540433) and next prime (6540451).

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52684 + ... + 52807.

It is an arithmetic number, because the mean of its divisors is an integer number (1265904).

Almost surely, 2^6540442 is an apocalyptic number.

6540442 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

6540442 is a deficient number, since it is larger than the sum of its proper divisors (3586790).

6540442 is a wasteful number, since it uses less digits than its factorization.

6540442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105524.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 6540442 is about 2557.4287868873. The cubic root of 6540442 is about 187.0118097149.

Adding to 6540442 its reverse (2440456), we get a palindrome (8980898).

The spelling of 6540442 in words is "six million, five hundred forty thousand, four hundred forty-two".