42204187 has 4 divisors (see below), whose sum is σ = 44425480. Its totient is φ = 39982896.

The previous prime is 42204181. The next prime is 42204203. The reversal of 42204187 is 78140224.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42204187 - 2³ = 42204179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42204181) 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, 1110618 + ... + 1110655.

It is an arithmetic number, because the mean of its divisors is an integer number (11106370).

Almost surely, 2^42204187 is an apocalyptic number.

42204187 is a deficient number, since it is larger than the sum of its proper divisors (2221293).

42204187 is a wasteful number, since it uses less digits than its factorization.

42204187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2221292.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 42204187 is about 6496.4749672419. The cubic root of 42204187 is about 348.1650552516.

The spelling of 42204187 in words is "forty-two million, two hundred four thousand, one hundred eighty-seven".