441252021 has 16 divisors (see below), whose sum is σ = 674584064. Its totient is φ = 251319024.

The previous prime is 441252013. The next prime is 441252037. The reversal of 441252021 is 120252144.

It is not a de Polignac number, because 441252021 - 2³ = 441252013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (441252001) 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, 27775 + ... + 40668.

It is an arithmetic number, because the mean of its divisors is an integer number (42161504).

Almost surely, 2^441252021 is an apocalyptic number.

It is an amenable number.

441252021 is a deficient number, since it is larger than the sum of its proper divisors (233332043).

441252021 is a wasteful number, since it uses less digits than its factorization.

441252021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68760.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 441252021 is about 21005.9996429592. Note that the first 3 decimals coincide. The cubic root of 441252021 is about 761.3112296219.

The spelling of 441252021 in words is "four hundred forty-one million, two hundred fifty-two thousand, twenty-one".