445121 has 4 divisors (see below), whose sum is σ = 460500. Its totient is φ = 429744.

The previous prime is 445103. The next prime is 445141. The reversal of 445121 is 121544.

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 190096 + 255025 = 436^2 + 505^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445121 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 445121.

It is not an unprimeable number, because it can be changed into a prime (445141) 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, 7646 + ... + 7703.

It is an arithmetic number, because the mean of its divisors is an integer number (115125).

2⁴⁴⁵¹²¹ is an apocalyptic number.

It is an amenable number.

445121 is a deficient number, since it is larger than the sum of its proper divisors (15379).

445121 is a wasteful number, since it uses less digits than its factorization.

445121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15378.

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

The square root of 445121 is about 667.1738903764. The cubic root of 445121 is about 76.3529863437.

Adding to 445121 its reverse (121544), we get a palindrome (566665).

The spelling of 445121 in words is "four hundred forty-five thousand, one hundred twenty-one".