6621442 has 4 divisors (see below), whose sum is σ = 9932166. Its totient is φ = 3310720.

The previous prime is 6621421. The next prime is 6621451. The reversal of 6621442 is 2441266.

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., 5202961 + 1418481 = 2281^2 + 1191^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1655359 + ... + 1655362.

Almost surely, 2^6621442 is an apocalyptic number.

6621442 is a deficient number, since it is larger than the sum of its proper divisors (3310724).

6621442 is a wasteful number, since it uses less digits than its factorization.

6621442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3310723.

The product of its digits is 2304, while the sum is 25.

The square root of 6621442 is about 2573.2162754032. The cubic root of 6621442 is about 187.7806593891.

The spelling of 6621442 in words is "six million, six hundred twenty-one thousand, four hundred forty-two".