42646069 has 4 divisors (see below), whose sum is σ = 42669900. Its totient is φ = 42622240.

The previous prime is 42646063. The next prime is 42646187. The reversal of 42646069 is 96064624.

42646069 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13593969 + 29052100 = 3687^2 + 5390^2 .

It is a cyclic number.

It is not a de Polignac number, because 42646069 - 2²⁵ = 9091637 is a prime.

It is a super-2 number, since 2×42646069² = 3637374402305522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42646063) 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 3 ways as a sum of consecutive naturals, for example, 8992 + ... + 12889.

It is an arithmetic number, because the mean of its divisors is an integer number (10667475).

Almost surely, 2^42646069 is an apocalyptic number.

It is an amenable number.

42646069 is a deficient number, since it is larger than the sum of its proper divisors (23831).

42646069 is a wasteful number, since it uses less digits than its factorization.

42646069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23830.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 42646069 is about 6530.3957766739. The cubic root of 42646069 is about 349.3759464710.

The spelling of 42646069 in words is "forty-two million, six hundred forty-six thousand, sixty-nine".