1045221440 has 56 divisors (see below), whose sum is σ = 2526133632. Its totient is φ = 411840000.

The previous prime is 1045221413. The next prime is 1045221469. The reversal of 1045221440 is 441225401.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2936 + ... + 45815.

Almost surely, 2^1045221440 is an apocalyptic number.

1045221440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1045221440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1263066816).

1045221440 is an abundant number, since it is smaller than the sum of its proper divisors (1480912192).

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

1045221440 is an equidigital number, since it uses as much as digits as its factorization.

1045221440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48835 (or 48825 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 1045221440 is about 32329.8846270753. The cubic root of 1045221440 is about 1014.8521353515.

Adding to 1045221440 its reverse (441225401), we get a palindrome (1486446841).

The spelling of 1045221440 in words is "one billion, forty-five million, two hundred twenty-one thousand, four hundred forty".