42021004 has 12 divisors (see below), whose sum is σ = 73684800. Its totient is φ = 20968208.

The previous prime is 42020983. The next prime is 42021017. The reversal of 42021004 is 40012024.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8284 + ... + 12355.

It is an arithmetic number, because the mean of its divisors is an integer number (6140400).

Almost surely, 2^42021004 is an apocalyptic number.

It is an amenable number.

42021004 is a deficient number, since it is larger than the sum of its proper divisors (31663796).

42021004 is a wasteful number, since it uses less digits than its factorization.

42021004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21152 (or 21150 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 42021004 is about 6482.3609896395. The cubic root of 42021004 is about 347.6605996444.

Adding to 42021004 its reverse (40012024), we get a palindrome (82033028).

The spelling of 42021004 in words is "forty-two million, twenty-one thousand, four".