42820715 has 8 divisors (see below), whose sum is σ = 58725600. Its totient is φ = 29362752.

The previous prime is 42820711. The next prime is 42820721. The reversal of 42820715 is 51702824.

42820715 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42820715 - 2² = 42820711 is a prime.

It is a super-2 number, since 2×42820715² = 3667227266222450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42820711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 611690 + ... + 611759.

It is an arithmetic number, because the mean of its divisors is an integer number (7340700).

Almost surely, 2^42820715 is an apocalyptic number.

42820715 is a deficient number, since it is larger than the sum of its proper divisors (15904885).

42820715 is a wasteful number, since it uses less digits than its factorization.

42820715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223461.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 42820715 is about 6543.7538920714. The cubic root of 42820715 is about 349.8522233289.

The spelling of 42820715 in words is "forty-two million, eight hundred twenty thousand, seven hundred fifteen".