42981286 has 4 divisors (see below), whose sum is σ = 64471932. Its totient is φ = 21490642.

The previous prime is 42981269. The next prime is 42981299. The reversal of 42981286 is 68218924.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 10745320 + ... + 10745323.

It is an arithmetic number, because the mean of its divisors is an integer number (16117983).

Almost surely, 2^42981286 is an apocalyptic number.

42981286 is a deficient number, since it is larger than the sum of its proper divisors (21490646).

42981286 is a wasteful number, since it uses less digits than its factorization.

42981286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21490645.

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

The square root of 42981286 is about 6556.0114398924. The cubic root of 42981286 is about 350.2889749497.

The spelling of 42981286 in words is "forty-two million, nine hundred eighty-one thousand, two hundred eighty-six".