445210121 has 8 divisors (see below), whose sum is σ = 451605000. Its totient is φ = 438854400.

The previous prime is 445210099. The next prime is 445210153. The reversal of 445210121 is 121012544.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 355699600 + 89510521 = 18860^2 + 9461^2 .

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-445210121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 445210093 and 445210102.

It is not an unprimeable number, because it can be changed into a prime (445212121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13505 + ... + 32753.

It is an arithmetic number, because the mean of its divisors is an integer number (56450625).

Almost surely, 2^445210121 is an apocalyptic number.

It is an amenable number.

445210121 is a deficient number, since it is larger than the sum of its proper divisors (6394879).

445210121 is a wasteful number, since it uses less digits than its factorization.

445210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19579.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 445210121 is about 21100.0028672984. The cubic root of 445210121 is about 763.5808173758.

Adding to 445210121 its reverse (121012544), we get a palindrome (566222665).

The spelling of 445210121 in words is "four hundred forty-five million, two hundred ten thousand, one hundred twenty-one".