42088881 has 4 divisors (see below), whose sum is σ = 56118512. Its totient is φ = 28059252.

The previous prime is 42088877. The next prime is 42088883. The reversal of 42088881 is 18888024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 42088881 - 2² = 42088877 is a prime.

It is a super-2 number, since 2×42088881² = 3542947807664322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42088883) 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, 7014811 + ... + 7014816.

It is an arithmetic number, because the mean of its divisors is an integer number (14029628).

Almost surely, 2^42088881 is an apocalyptic number.

It is an amenable number.

42088881 is a deficient number, since it is larger than the sum of its proper divisors (14029631).

42088881 is a wasteful number, since it uses less digits than its factorization.

42088881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14029630.

The product of its (nonzero) digits is 32768, while the sum is 39.

The square root of 42088881 is about 6487.5943923769. The cubic root of 42088881 is about 347.8476923008.

The spelling of 42088881 in words is "forty-two million, eighty-eight thousand, eight hundred eighty-one".