1421044240 has 160 divisors (see below), whose sum is σ = 4137235200. Its totient is φ = 440985600.

The previous prime is 1421044231. The next prime is 1421044241. The reversal of 1421044240 is 424401241.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (1421044241) 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 31 ways as a sum of consecutive naturals, for example, 2149510 + ... + 2150170.

It is an arithmetic number, because the mean of its divisors is an integer number (25857720).

Almost surely, 2^1421044240 is an apocalyptic number.

1421044240 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 1421044240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2068617600).

1421044240 is an abundant number, since it is smaller than the sum of its proper divisors (2716190960).

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

1421044240 is a wasteful number, since it uses less digits than its factorization.

1421044240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041 (or 1035 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 1421044240 is about 37696.7404426430. The cubic root of 1421044240 is about 1124.2663173440.

Adding to 1421044240 its reverse (424401241), we get a palindrome (1845445481).

The spelling of 1421044240 in words is "one billion, four hundred twenty-one million, forty-four thousand, two hundred forty".