204120042 has 32 divisors (see below), whose sum is σ = 472473600. Its totient is φ = 57580848.

The previous prime is 204120041. The next prime is 204120043. The reversal of 204120042 is 240021402.

It is an interprime number because it is at equal distance from previous prime (204120041) and next prime (204120043).

It is not an unprimeable number, because it can be changed into a prime (204120041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27442 + ... + 34077.

It is an arithmetic number, because the mean of its divisors is an integer number (14764800).

Almost surely, 2^204120042 is an apocalyptic number.

204120042 is an abundant number, since it is smaller than the sum of its proper divisors (268353558).

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

204120042 is a wasteful number, since it uses less digits than its factorization.

204120042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61610.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 204120042 is about 14287.0585496106. The cubic root of 204120042 is about 588.7919762175.

Adding to 204120042 its reverse (240021402), we get a palindrome (444141444).

The spelling of 204120042 in words is "two hundred four million, one hundred twenty thousand, forty-two".