42123406 has 16 divisors (see below), whose sum is σ = 68429088. Its totient is φ = 19332000.

The previous prime is 42123401. The next prime is 42123449. The reversal of 42123406 is 60432124.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42123401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231 + ... + 9181.

It is an arithmetic number, because the mean of its divisors is an integer number (4276818).

Almost surely, 2^42123406 is an apocalyptic number.

42123406 is a deficient number, since it is larger than the sum of its proper divisors (26305682).

42123406 is a wasteful number, since it uses less digits than its factorization.

42123406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9147.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 42123406 is about 6490.2546945401. The cubic root of 42123406 is about 347.9427780579.

The spelling of 42123406 in words is "forty-two million, one hundred twenty-three thousand, four hundred six".