42782258 has 4 divisors (see below), whose sum is σ = 64173390. Its totient is φ = 21391128.

The previous prime is 42782239. The next prime is 42782261. The reversal of 42782258 is 85228724.

It is a happy number.

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., 28440889 + 14341369 = 5333^2 + 3787^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10695563 + ... + 10695566.

Almost surely, 2^42782258 is an apocalyptic number.

42782258 is a deficient number, since it is larger than the sum of its proper divisors (21391132).

42782258 is a wasteful number, since it uses less digits than its factorization.

42782258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21391131.

The product of its digits is 71680, while the sum is 38.

The square root of 42782258 is about 6540.8147810498. The cubic root of 42782258 is about 349.7474586398.

The spelling of 42782258 in words is "forty-two million, seven hundred eighty-two thousand, two hundred fifty-eight".