42881123 has 4 divisors (see below), whose sum is σ = 45403560. Its totient is φ = 40358688.

The previous prime is 42881101. The next prime is 42881159. The reversal of 42881123 is 32118824.

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 42881123 - 2²² = 38686819 is a prime.

It is a super-2 number, since 2×42881123² = 3677581419482258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42881183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1261193 + ... + 1261226.

It is an arithmetic number, because the mean of its divisors is an integer number (11350890).

Almost surely, 2^42881123 is an apocalyptic number.

42881123 is a deficient number, since it is larger than the sum of its proper divisors (2522437).

42881123 is a wasteful number, since it uses less digits than its factorization.

42881123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2522436.

The product of its digits is 3072, while the sum is 29.

The square root of 42881123 is about 6548.3679646153. The cubic root of 42881123 is about 350.0166604314.

Adding to 42881123 its reverse (32118824), we get a palindrome (74999947).

The spelling of 42881123 in words is "forty-two million, eight hundred eighty-one thousand, one hundred twenty-three".