42004100 has 18 divisors (see below), whose sum is σ = 91149114. Its totient is φ = 16801600.

The previous prime is 42004099. The next prime is 42004103. The reversal of 42004100 is 140024.

It can be written as a sum of positive squares in 3 ways, for example, as 3041536 + 38962564 = 1744^2 + 6242^2 .

It is not an unprimeable number, because it can be changed into a prime (42004103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 209921 + ... + 210120.

Almost surely, 2^42004100 is an apocalyptic number.

It is an amenable number.

42004100 is an abundant number, since it is smaller than the sum of its proper divisors (49145014).

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

42004100 is a wasteful number, since it uses less digits than its factorization.

42004100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420055 (or 420048 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 42004100 is about 6481.0570125559. The cubic root of 42004100 is about 347.6139750010.

Adding to 42004100 its reverse (140024), we get a palindrome (42144124).

The spelling of 42004100 in words is "forty-two million, four thousand, one hundred".