42456782 has 4 divisors (see below), whose sum is σ = 63685176. Its totient is φ = 21228390.

The previous prime is 42456779. The next prime is 42456809. The reversal of 42456782 is 28765424.

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, 10614194 + ... + 10614197.

It is an arithmetic number, because the mean of its divisors is an integer number (15921294).

Almost surely, 2^42456782 is an apocalyptic number.

42456782 is a deficient number, since it is larger than the sum of its proper divisors (21228394).

42456782 is a wasteful number, since it uses less digits than its factorization.

42456782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21228393.

The product of its digits is 107520, while the sum is 38.

The square root of 42456782 is about 6515.8868928182. The cubic root of 42456782 is about 348.8582714750.

The spelling of 42456782 in words is "forty-two million, four hundred fifty-six thousand, seven hundred eighty-two".