42247286 has 4 divisors (see below), whose sum is σ = 63370932. Its totient is φ = 21123642.

The previous prime is 42247277. The next prime is 42247291. The reversal of 42247286 is 68274224.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 10561820 + ... + 10561823.

It is an arithmetic number, because the mean of its divisors is an integer number (15842733).

Almost surely, 2^42247286 is an apocalyptic number.

42247286 is a deficient number, since it is larger than the sum of its proper divisors (21123646).

42247286 is a wasteful number, since it uses less digits than its factorization.

42247286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21123645.

The product of its digits is 43008, while the sum is 35.

The square root of 42247286 is about 6499.7912274165. The cubic root of 42247286 is about 348.2835305481.

The spelling of 42247286 in words is "forty-two million, two hundred forty-seven thousand, two hundred eighty-six".