42917138 has 16 divisors (see below), whose sum is σ = 71192736. Its totient is φ = 19239840.

The previous prime is 42917137. The next prime is 42917141. The reversal of 42917138 is 83171924.

42917138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×42917138² = 3683761468222088, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42917098 and 42917107.

It is not an unprimeable number, because it can be changed into a prime (42917137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11756 + ... + 14967.

It is an arithmetic number, because the mean of its divisors is an integer number (4449546).

Almost surely, 2^42917138 is an apocalyptic number.

42917138 is a deficient number, since it is larger than the sum of its proper divisors (28275598).

42917138 is a wasteful number, since it uses less digits than its factorization.

42917138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26809.

The product of its digits is 12096, while the sum is 35.

The square root of 42917138 is about 6551.1173092840. The cubic root of 42917138 is about 350.1146236816.

The spelling of 42917138 in words is "forty-two million, nine hundred seventeen thousand, one hundred thirty-eight".