6421027 has 4 divisors (see below), whose sum is σ = 6511536. Its totient is φ = 6330520.

The previous prime is 6421021. The next prime is 6421039. The reversal of 6421027 is 7201246.

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

It is a cyclic number.

It is not a de Polignac number, because 6421027 - 2⁷ = 6420899 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6420989 and 6421007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6421021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45148 + ... + 45289.

It is an arithmetic number, because the mean of its divisors is an integer number (1627884).

Almost surely, 2^6421027 is an apocalyptic number.

6421027 is a deficient number, since it is larger than the sum of its proper divisors (90509).

6421027 is an equidigital number, since it uses as much as digits as its factorization.

6421027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90508.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 6421027 is about 2533.9745460442. The cubic root of 6421027 is about 185.8666616721.

The spelling of 6421027 in words is "six million, four hundred twenty-one thousand, twenty-seven".