1244421340 has 48 divisors (see below), whose sum is σ = 2817954720. Its totient is φ = 460062720.

The previous prime is 1244421317. The next prime is 1244421341. The reversal of 1244421340 is 431244421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244421341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24357 + ... + 55516.

It is an arithmetic number, because the mean of its divisors is an integer number (58707390).

Almost surely, 2^1244421340 is an apocalyptic number.

1244421340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1244421340 is an abundant number, since it is smaller than the sum of its proper divisors (1573533380).

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

1244421340 is a wasteful number, since it uses less digits than its factorization.

1244421340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79942 (or 79940 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 1244421340 is about 35276.3566712891. The cubic root of 1244421340 is about 1075.6124406348.

Adding to 1244421340 its reverse (431244421), we get a palindrome (1675665761).

The spelling of 1244421340 in words is "one billion, two hundred forty-four million, four hundred twenty-one thousand, three hundred forty".