6421120 has 64 divisors (see below), whose sum is σ = 15667200. Its totient is φ = 2515968.

The previous prime is 6421111. The next prime is 6421127. The reversal of 6421120 is 211246.

6421120 = T₁₀₄ + T₁₀₅ + ... + T₃₄₀.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6421094 and 6421103.

It is not an unprimeable number, because it can be changed into a prime (6421127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50497 + ... + 50623.

It is an arithmetic number, because the mean of its divisors is an integer number (244800).

Almost surely, 2^6421120 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6421120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7833600).

6421120 is an abundant number, since it is smaller than the sum of its proper divisors (9246080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6421120 is a wasteful number, since it uses less digits than its factorization.

6421120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 6421120 is about 2533.9928965962. The cubic root of 6421120 is about 185.8675590113.

Adding to 6421120 its reverse (211246), we get a palindrome (6632366).

The spelling of 6421120 in words is "six million, four hundred twenty-one thousand, one hundred twenty".