42120004 has 12 divisors (see below), whose sum is σ = 73773504. Its totient is φ = 21041864.

The previous prime is 42119993. The next prime is 42120007. The reversal of 42120004 is 40002124.

It is not an unprimeable number, because it can be changed into a prime (42120007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1617 + ... + 9319.

It is an arithmetic number, because the mean of its divisors is an integer number (6147792).

Almost surely, 2^42120004 is an apocalyptic number.

It is an amenable number.

42120004 is a deficient number, since it is larger than the sum of its proper divisors (31653500).

42120004 is a wasteful number, since it uses less digits than its factorization.

42120004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9074 (or 9072 counting only the distinct ones).

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

The square root of 42120004 is about 6489.9926040019. The cubic root of 42120004 is about 347.9334108730.

Adding to 42120004 its reverse (40002124), we get a palindrome (82122128).

The spelling of 42120004 in words is "forty-two million, one hundred twenty thousand, four".