6550042 has 4 divisors (see below), whose sum is σ = 9825066. Its totient is φ = 3275020.

The previous prime is 6550031. The next prime is 6550043. The reversal of 6550042 is 2400556.

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., 4888521 + 1661521 = 2211^2 + 1289^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 6549995 and 6550022.

It is not an unprimeable number, because it can be changed into a prime (6550043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1637509 + ... + 1637512.

Almost surely, 2^6550042 is an apocalyptic number.

6550042 is a deficient number, since it is larger than the sum of its proper divisors (3275024).

6550042 is a wasteful number, since it uses less digits than its factorization.

6550042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3275023.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 6550042 is about 2559.3049837798. The cubic root of 6550042 is about 187.1032630502.

Adding to 6550042 its reverse (2400556), we get a palindrome (8950598).

The spelling of 6550042 in words is "six million, five hundred fifty thousand, forty-two".