42441621 has 4 divisors (see below), whose sum is σ = 56588832. Its totient is φ = 28294412.

The previous prime is 42441617. The next prime is 42441643. The reversal of 42441621 is 12614424.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42441621 - 2² = 42441617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42441591 and 42441600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42441121) 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, 7073601 + ... + 7073606.

It is an arithmetic number, because the mean of its divisors is an integer number (14147208).

Almost surely, 2^42441621 is an apocalyptic number.

It is an amenable number.

42441621 is a deficient number, since it is larger than the sum of its proper divisors (14147211).

42441621 is a wasteful number, since it uses less digits than its factorization.

42441621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14147210.

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

The square root of 42441621 is about 6514.7234016495. The cubic root of 42441621 is about 348.8167416362.

The spelling of 42441621 in words is "forty-two million, four hundred forty-one thousand, six hundred twenty-one".