42644451 has 4 divisors (see below), whose sum is σ = 56859272. Its totient is φ = 28429632.

The previous prime is 42644443. The next prime is 42644453. The reversal of 42644451 is 15444624.

It is a happy number.

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

It is not a de Polignac number, because 42644451 - 2³ = 42644443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42644453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7107406 + ... + 7107411.

It is an arithmetic number, because the mean of its divisors is an integer number (14214818).

Almost surely, 2^42644451 is an apocalyptic number.

42644451 is a deficient number, since it is larger than the sum of its proper divisors (14214821).

42644451 is a wasteful number, since it uses less digits than its factorization.

42644451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14214820.

The product of its digits is 15360, while the sum is 30.

The square root of 42644451 is about 6530.2718932675. The cubic root of 42644451 is about 349.3715279517.

The spelling of 42644451 in words is "forty-two million, six hundred forty-four thousand, four hundred fifty-one".