445202021 has 8 divisors (see below), whose sum is σ = 492516288. Its totient is φ = 399028000.

The previous prime is 445201993. The next prime is 445202029. The reversal of 445202021 is 120202544.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445202021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 445201984 and 445202002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445202029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284240 + ... + 285801.

It is an arithmetic number, because the mean of its divisors is an integer number (61564536).

Almost surely, 2^445202021 is an apocalyptic number.

It is an amenable number.

445202021 is a deficient number, since it is larger than the sum of its proper divisors (47314267).

445202021 is a wasteful number, since it uses less digits than its factorization.

445202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570123.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 445202021 is about 21099.8109233235. The cubic root of 445202021 is about 763.5761865720.

Adding to 445202021 its reverse (120202544), we get a palindrome (565404565).

The spelling of 445202021 in words is "four hundred forty-five million, two hundred two thousand, twenty-one".