42781082 has 4 divisors (see below), whose sum is σ = 64171626. Its totient is φ = 21390540.

The previous prime is 42781051. The next prime is 42781091. The reversal of 42781082 is 28018724.

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

It can be written as a sum of positive squares in only one way, i.e., 35058241 + 7722841 = 5921^2 + 2779^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10695269 + ... + 10695272.

Almost surely, 2^42781082 is an apocalyptic number.

42781082 is a deficient number, since it is larger than the sum of its proper divisors (21390544).

42781082 is a wasteful number, since it uses less digits than its factorization.

42781082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21390543.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 42781082 is about 6540.7248833749. The cubic root of 42781082 is about 349.7442539875.

The spelling of 42781082 in words is "forty-two million, seven hundred eighty-one thousand, eighty-two".