42644401 has 8 divisors (see below), whose sum is σ = 43412040. Its totient is φ = 41883648.

The previous prime is 42644389. The next prime is 42644411. The reversal of 42644401 is 10444624.

42644401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7834401 + 34810000 = 2799^2 + 5900^2 .

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 42644401 - 2⁹ = 42643889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42644411) 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, 11685 + ... + 14893.

It is an arithmetic number, because the mean of its divisors is an integer number (5426505).

Almost surely, 2^42644401 is an apocalyptic number.

It is an amenable number.

42644401 is a deficient number, since it is larger than the sum of its proper divisors (767639).

42644401 is a wasteful number, since it uses less digits than its factorization.

42644401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3443.

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 42644401 is about 6530.2680649419. The cubic root of 42644401 is about 349.3713914073.

The spelling of 42644401 in words is "forty-two million, six hundred forty-four thousand, four hundred one".