1445221232 has 80 divisors (see below), whose sum is σ = 3488110080. Its totient is φ = 564800256.

The previous prime is 1445221231. The next prime is 1445221273. The reversal of 1445221232 is 2321225441.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1445221231) 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 15 ways as a sum of consecutive naturals, for example, 114869 + ... + 126827.

It is an arithmetic number, because the mean of its divisors is an integer number (43601376).

Almost surely, 2^1445221232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1445221232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1744055040).

1445221232 is an abundant number, since it is smaller than the sum of its proper divisors (2042888848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1445221232 is a wasteful number, since it uses less digits than its factorization.

1445221232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12070 (or 12064 counting only the distinct ones).

The product of its digits is 3840, while the sum is 26.

The square root of 1445221232 is about 38016.0654460716. The cubic root of 1445221232 is about 1130.6064127054.

Adding to 1445221232 its reverse (2321225441), we get a palindrome (3766446673).

The spelling of 1445221232 in words is "one billion, four hundred forty-five million, two hundred twenty-one thousand, two hundred thirty-two".