42286891 has 4 divisors (see below), whose sum is σ = 42308784. Its totient is φ = 42265000.

The previous prime is 42286889. The next prime is 42286897. The reversal of 42286891 is 19868224.

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 42286891 - 2¹ = 42286889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42286897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7735 + ... + 12016.

It is an arithmetic number, because the mean of its divisors is an integer number (10577196).

Almost surely, 2^42286891 is an apocalyptic number.

42286891 is a deficient number, since it is larger than the sum of its proper divisors (21893).

42286891 is a wasteful number, since it uses less digits than its factorization.

42286891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21892.

The product of its digits is 55296, while the sum is 40.

The square root of 42286891 is about 6502.8371500446. The cubic root of 42286891 is about 348.3923301297.

The spelling of 42286891 in words is "forty-two million, two hundred eighty-six thousand, eight hundred ninety-one".