42118834 has 4 divisors (see below), whose sum is σ = 63178254. Its totient is φ = 21059416.

The previous prime is 42118831. The next prime is 42118837. The reversal of 42118834 is 43881124.

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

It is an interprime number because it is at equal distance from previous prime (42118831) and next prime (42118837).

It can be written as a sum of positive squares in only one way, i.e., 41563809 + 555025 = 6447^2 + 745^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 42118796 and 42118805.

It is not an unprimeable number, because it can be changed into a prime (42118831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10529707 + ... + 10529710.

Almost surely, 2^42118834 is an apocalyptic number.

42118834 is a deficient number, since it is larger than the sum of its proper divisors (21059420).

42118834 is a wasteful number, since it uses less digits than its factorization.

42118834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21059419.

The product of its digits is 6144, while the sum is 31.

The square root of 42118834 is about 6489.9024645984. The cubic root of 42118834 is about 347.9301892378.

Adding to 42118834 its reverse (43881124), we get a palindrome (85999958).

The spelling of 42118834 in words is "forty-two million, one hundred eighteen thousand, eight hundred thirty-four".