42123206 has 4 divisors (see below), whose sum is σ = 63184812. Its totient is φ = 21061602.

The previous prime is 42123199. The next prime is 42123217. The reversal of 42123206 is 60232124.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10530800 + ... + 10530803.

It is an arithmetic number, because the mean of its divisors is an integer number (15796203).

Almost surely, 2^42123206 is an apocalyptic number.

42123206 is a deficient number, since it is larger than the sum of its proper divisors (21061606).

42123206 is a wasteful number, since it uses less digits than its factorization.

42123206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21061605.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 42123206 is about 6490.2392868060. The cubic root of 42123206 is about 347.9422273849.

The spelling of 42123206 in words is "forty-two million, one hundred twenty-three thousand, two hundred six".