6540994 has 4 divisors (see below), whose sum is σ = 9811494. Its totient is φ = 3270496.

The previous prime is 6540983. The next prime is 6541021. The reversal of 6540994 is 4990456.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3861225 + 2679769 = 1965^2 + 1637^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1635247 + ... + 1635250.

Almost surely, 2^6540994 is an apocalyptic number.

6540994 is a deficient number, since it is larger than the sum of its proper divisors (3270500).

6540994 is a wasteful number, since it uses less digits than its factorization.

6540994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3270499.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 6540994 is about 2557.5367055040. The cubic root of 6540994 is about 187.0170707056.

The spelling of 6540994 in words is "six million, five hundred forty thousand, nine hundred ninety-four".