1244834721 has 12 divisors (see below), whose sum is σ = 1936409748. Its totient is φ = 766052064.

The previous prime is 1244834713. The next prime is 1244834737. The reversal of 1244834721 is 1274384421.

It can be written as a sum of positive squares in 2 ways, for example, as 663783696 + 581051025 = 25764^2 + 24105^2 .

It is not a de Polignac number, because 1244834721 - 2³ = 1244834713 is a prime.

It is a super-2 number, since 2×1244834721² = 3099226965214295682, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1244834321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5319690 + ... + 5319923.

It is an arithmetic number, because the mean of its divisors is an integer number (161367479).

Almost surely, 2^1244834721 is an apocalyptic number.

It is an amenable number.

1244834721 is a deficient number, since it is larger than the sum of its proper divisors (691575027).

1244834721 is a wasteful number, since it uses less digits than its factorization.

1244834721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10639632 (or 10639629 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 1244834721 is about 35282.2153641179. The cubic root of 1244834721 is about 1075.7315290568.

The spelling of 1244834721 in words is "one billion, two hundred forty-four million, eight hundred thirty-four thousand, seven hundred twenty-one".