6347021 has 4 divisors (see below), whose sum is σ = 6482112. Its totient is φ = 6211932.

The previous prime is 6347009. The next prime is 6347023. The reversal of 6347021 is 1207436.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6347021 - 2⁶ = 6346957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6347023) 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, 67475 + ... + 67568.

It is an arithmetic number, because the mean of its divisors is an integer number (1620528).

Almost surely, 2^6347021 is an apocalyptic number.

It is an amenable number.

6347021 is a deficient number, since it is larger than the sum of its proper divisors (135091).

6347021 is a wasteful number, since it uses less digits than its factorization.

6347021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135090.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 6347021 is about 2519.3294742848. The cubic root of 6347021 is about 185.1498274930.

The spelling of 6347021 in words is "six million, three hundred forty-seven thousand, twenty-one".