6421115 has 4 divisors (see below), whose sum is σ = 7705344. Its totient is φ = 5136888.

The previous prime is 6421111. The next prime is 6421127. The reversal of 6421115 is 5111246.

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 6421115 - 2² = 6421111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6421111) 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, 642107 + ... + 642116.

It is an arithmetic number, because the mean of its divisors is an integer number (1926336).

Almost surely, 2^6421115 is an apocalyptic number.

6421115 is a deficient number, since it is larger than the sum of its proper divisors (1284229).

6421115 is a wasteful number, since it uses less digits than its factorization.

6421115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284228.

The product of its digits is 240, while the sum is 20.

The square root of 6421115 is about 2533.9919100108. The cubic root of 6421115 is about 185.8675107674.

The spelling of 6421115 in words is "six million, four hundred twenty-one thousand, one hundred fifteen".