42620805 has 12 divisors (see below), whose sum is σ = 73876140. Its totient is φ = 22731072.

The previous prime is 42620797. The next prime is 42620821. The reversal of 42620805 is 50802624.

It can be written as a sum of positive squares in 2 ways, for example, as 33385284 + 9235521 = 5778^2 + 3039^2 .

It is not a de Polignac number, because 42620805 - 2³ = 42620797 is a prime.

It is a plaindrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 473520 + ... + 473609.

It is an arithmetic number, because the mean of its divisors is an integer number (6156345).

Almost surely, 2^42620805 is an apocalyptic number.

42620805 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42620805 is a deficient number, since it is larger than the sum of its proper divisors (31255335).

42620805 is a wasteful number, since it uses less digits than its factorization.

42620805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947140 (or 947137 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 42620805 is about 6528.4611509911. The cubic root of 42620805 is about 349.3069414592.

The spelling of 42620805 in words is "forty-two million, six hundred twenty thousand, eight hundred five".