6420442111 has 8 divisors (see below), whose sum is σ = 6774870240. Its totient is φ = 6072287232.

The previous prime is 6420442099. The next prime is 6420442123. The reversal of 6420442111 is 1112440246.

It is an interprime number because it is at equal distance from previous prime (6420442099) and next prime (6420442123).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6420442111 - 2¹¹ = 6420440063 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 (6420442141) 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, 1566210 + ... + 1570303.

It is an arithmetic number, because the mean of its divisors is an integer number (846858780).

Almost surely, 2^6420442111 is an apocalyptic number.

6420442111 is a deficient number, since it is larger than the sum of its proper divisors (354428129).

6420442111 is a wasteful number, since it uses less digits than its factorization.

6420442111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3136625.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 6420442111 is about 80127.6613348973. The cubic root of 6420442111 is about 1858.6101799204.

Adding to 6420442111 its reverse (1112440246), we get a palindrome (7532882357).

The spelling of 6420442111 in words is "six billion, four hundred twenty million, four hundred forty-two thousand, one hundred eleven".