445020101 has 4 divisors (see below), whose sum is σ = 471197772. Its totient is φ = 418842432.

The previous prime is 445020091. The next prime is 445020137. The reversal of 445020101 is 101020544.

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

It can be written as a sum of positive squares in 2 ways, for example, as 176092900 + 268927201 = 13270^2 + 16399^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445020101 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 26177653 = 445020101 / (4 + 4 + 5 + 0 + 2 + 0 + 1 + 0 + 1).

It is a self number, because there is not a number n which added to its sum of digits gives 445020101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445020161) 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, 13088810 + ... + 13088843.

It is an arithmetic number, because the mean of its divisors is an integer number (117799443).

Almost surely, 2^445020101 is an apocalyptic number.

It is an amenable number.

445020101 is a deficient number, since it is larger than the sum of its proper divisors (26177671).

445020101 is a wasteful number, since it uses less digits than its factorization.

445020101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26177670.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 445020101 is about 21095.4995437416. The cubic root of 445020101 is about 763.4721673492.

Adding to 445020101 its reverse (101020544), we get a palindrome (546040645).

The spelling of 445020101 in words is "four hundred forty-five million, twenty thousand, one hundred one".