6420042 has 24 divisors (see below), whose sum is σ = 14057316. Its totient is φ = 2117376.

The previous prime is 6420041. The next prime is 6420053. The reversal of 6420042 is 2400246.

It can be written as a sum of positive squares in 2 ways, for example, as 6305121 + 114921 = 2511^2 + 339^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 6419997 and 6420024.

It is not an unprimeable number, because it can be changed into a prime (6420041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93 + ... + 3584.

Almost surely, 2^6420042 is an apocalyptic number.

6420042 is an abundant number, since it is smaller than the sum of its proper divisors (7637274).

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

6420042 is a wasteful number, since it uses less digits than its factorization.

6420042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3782 (or 3779 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 6420042 is about 2533.7801798893. The cubic root of 6420042 is about 185.8571570646.

Adding to 6420042 its reverse (2400246), we get a palindrome (8820288).

It can be divided in two parts, 6 and 420042, that multiplied together give a palindrome (2520252).

The spelling of 6420042 in words is "six million, four hundred twenty thousand, forty-two".