442041621 has 16 divisors (see below), whose sum is σ = 674985984. Its totient is φ = 252070704.

The previous prime is 442041619. The next prime is 442041643. The reversal of 442041621 is 126140244.

It is a happy number.

It is not a de Polignac number, because 442041621 - 2¹ = 442041619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 442041591 and 442041600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442041671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11385 + ... + 31838.

It is an arithmetic number, because the mean of its divisors is an integer number (42186624).

Almost surely, 2^442041621 is an apocalyptic number.

It is an amenable number.

442041621 is a deficient number, since it is larger than the sum of its proper divisors (232944363).

442041621 is a wasteful number, since it uses less digits than its factorization.

442041621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43720.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 442041621 is about 21024.7858728692. The cubic root of 442041621 is about 761.7650693845.

Adding to 442041621 its reverse (126140244), we get a palindrome (568181865).

The spelling of 442041621 in words is "four hundred forty-two million, forty-one thousand, six hundred twenty-one".