42291817 has 4 divisors (see below), whose sum is σ = 42551440. Its totient is φ = 42032196.

The previous prime is 42291811. The next prime is 42291839. The reversal of 42291817 is 71819224.

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 a cyclic number.

It is not a de Polignac number, because 42291817 - 2²³ = 33903209 is a prime.

It is a super-2 number, since 2×42291817² = 3577195570322978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42291811) 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, 129567 + ... + 129892.

It is an arithmetic number, because the mean of its divisors is an integer number (10637860).

Almost surely, 2^42291817 is an apocalyptic number.

It is an amenable number.

42291817 is a deficient number, since it is larger than the sum of its proper divisors (259623).

42291817 is a wasteful number, since it uses less digits than its factorization.

42291817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259622.

The product of its digits is 8064, while the sum is 34.

The square root of 42291817 is about 6503.2158967698. The cubic root of 42291817 is about 348.4058576788.

The spelling of 42291817 in words is "forty-two million, two hundred ninety-one thousand, eight hundred seventeen".