42288281 has 8 divisors (see below), whose sum is σ = 50873280. Its totient is φ = 34339248.

The previous prime is 42288269. The next prime is 42288313. The reversal of 42288281 is 18288224.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42288281 - 2¹⁰ = 42287257 is a prime.

It is a super-2 number, since 2×42288281² = 3576597419869922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42288481) 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, 158846 + ... + 159111.

It is an arithmetic number, because the mean of its divisors is an integer number (6359160).

Almost surely, 2^42288281 is an apocalyptic number.

It is an amenable number.

42288281 is a deficient number, since it is larger than the sum of its proper divisors (8584999).

42288281 is a wasteful number, since it uses less digits than its factorization.

42288281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317983.

The product of its digits is 16384, while the sum is 35.

The square root of 42288281 is about 6502.9440255933. The cubic root of 42288281 is about 348.3961473886.

The spelling of 42288281 in words is "forty-two million, two hundred eighty-eight thousand, two hundred eighty-one".