42820801 has 4 divisors (see below), whose sum is σ = 42899632. Its totient is φ = 42741972.

The previous prime is 42820783. The next prime is 42820847. The reversal of 42820801 is 10802824.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42820801 - 2⁹ = 42820289 is a prime.

It is a super-3 number, since 3×42820801³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42820861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38595 + ... + 39688.

It is an arithmetic number, because the mean of its divisors is an integer number (10724908).

Almost surely, 2^42820801 is an apocalyptic number.

It is an amenable number.

42820801 is a deficient number, since it is larger than the sum of its proper divisors (78831).

42820801 is an equidigital number, since it uses as much as digits as its factorization.

42820801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78830.

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 42820801 is about 6543.7604632199. The cubic root of 42820801 is about 349.8524575401.

The spelling of 42820801 in words is "forty-two million, eight hundred twenty thousand, eight hundred one".