1445134221 has 12 divisors (see below), whose sum is σ = 2099484348. Its totient is φ = 957852864.

The previous prime is 1445134169. The next prime is 1445134231. The reversal of 1445134221 is 1224315441.

1445134221 is a `hidden beast` number, since 144 + 513 + 4 + 2 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1397937321 + 47196900 = 37389^2 + 6870^2 .

It is not a de Polignac number, because 1445134221 - 2⁹ = 1445133709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1445134231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 462520 + ... + 465633.

It is an arithmetic number, because the mean of its divisors is an integer number (174957029).

Almost surely, 2^1445134221 is an apocalyptic number.

It is an amenable number.

1445134221 is a deficient number, since it is larger than the sum of its proper divisors (654350127).

1445134221 is a wasteful number, since it uses less digits than its factorization.

1445134221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928332 (or 928329 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 1445134221 is about 38014.9210310899. The cubic root of 1445134221 is about 1130.5837224841.

Adding to 1445134221 its reverse (1224315441), we get a palindrome (2669449662).

The spelling of 1445134221 in words is "one billion, four hundred forty-five million, one hundred thirty-four thousand, two hundred twenty-one".