42291086 has 4 divisors (see below), whose sum is σ = 63436632. Its totient is φ = 21145542.

The previous prime is 42291083. The next prime is 42291107. The reversal of 42291086 is 68019224.

42291086 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42291083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10572770 + ... + 10572773.

It is an arithmetic number, because the mean of its divisors is an integer number (15859158).

Almost surely, 2^42291086 is an apocalyptic number.

42291086 is a deficient number, since it is larger than the sum of its proper divisors (21145546).

42291086 is a wasteful number, since it uses less digits than its factorization.

42291086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21145545.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 42291086 is about 6503.1596935644. The cubic root of 42291086 is about 348.4038503074.

The spelling of 42291086 in words is "forty-two million, two hundred ninety-one thousand, eighty-six".