6421042 has 4 divisors (see below), whose sum is σ = 9631566. Its totient is φ = 3210520.

The previous prime is 6421039. The next prime is 6421049. The reversal of 6421042 is 2401246.

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., 3568321 + 2852721 = 1889^2 + 1689^2 .

It is not an unprimeable number, because it can be changed into a prime (6421049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1605259 + ... + 1605262.

Almost surely, 2^6421042 is an apocalyptic number.

6421042 is a deficient number, since it is larger than the sum of its proper divisors (3210524).

6421042 is a wasteful number, since it uses less digits than its factorization.

6421042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3210523.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 6421042 is about 2533.9775058197. The cubic root of 6421042 is about 185.8668064048.

Adding to 6421042 its reverse (2401246), we get a palindrome (8822288).

It can be divided in two parts, 6 and 421042, that multiplied together give a palindrome (2526252).

The spelling of 6421042 in words is "six million, four hundred twenty-one thousand, forty-two".