6428121 has 16 divisors (see below), whose sum is σ = 10061184. Its totient is φ = 3573504.

The previous prime is 6428117. The next prime is 6428131. The reversal of 6428121 is 1218246.

It is not a de Polignac number, because 6428121 - 2² = 6428117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6428091 and 6428100.

It is not an unprimeable number, because it can be changed into a prime (6428131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3360 + ... + 4913.

It is an arithmetic number, because the mean of its divisors is an integer number (628824).

Almost surely, 2^6428121 is an apocalyptic number.

It is an amenable number.

6428121 is a deficient number, since it is larger than the sum of its proper divisors (3633063).

6428121 is a wasteful number, since it uses less digits than its factorization.

6428121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8320.

The product of its digits is 768, while the sum is 24.

The square root of 6428121 is about 2535.3739369174. The cubic root of 6428121 is about 185.9350854523.

The spelling of 6428121 in words is "six million, four hundred twenty-eight thousand, one hundred twenty-one".