1310021444 has 12 divisors (see below), whose sum is σ = 2297045100. Its totient is φ = 653722848.

The previous prime is 1310021429. The next prime is 1310021473. The reversal of 1310021444 is 4441200131.

It can be written as a sum of positive squares in 2 ways, for example, as 1234679044 + 75342400 = 35138^2 + 8680^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319679 + ... + 323750.

It is an arithmetic number, because the mean of its divisors is an integer number (191420425).

Almost surely, 2^1310021444 is an apocalyptic number.

It is an amenable number.

1310021444 is a deficient number, since it is larger than the sum of its proper divisors (987023656).

1310021444 is a wasteful number, since it uses less digits than its factorization.

1310021444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643942 (or 643940 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1310021444 is about 36194.2183780780. The cubic root of 1310021444 is about 1094.1901517344.

Adding to 1310021444 its reverse (4441200131), we get a palindrome (5751221575).

The spelling of 1310021444 in words is "one billion, three hundred ten million, twenty-one thousand, four hundred forty-four".