1244204681 has 2 divisors, whose sum is σ = 1244204682. Its totient is φ = 1244204680.

The previous prime is 1244204677. The next prime is 1244204701. The reversal of 1244204681 is 1864024421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1130035456 + 114169225 = 33616^2 + 10685^2 .

It is a cyclic number.

It is not a de Polignac number, because 1244204681 - 2² = 1244204677 is a prime.

It is a super-2 number, since 2×1244204681² = 3096090576444623522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1244200681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622102340 + 622102341.

It is an arithmetic number, because the mean of its divisors is an integer number (622102341).

Almost surely, 2^1244204681 is an apocalyptic number.

It is an amenable number.

1244204681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244204681 is an equidigital number, since it uses as much as digits as its factorization.

1244204681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 1244204681 is about 35273.2856564284. The cubic root of 1244204681 is about 1075.5500141254.

The spelling of 1244204681 in words is "one billion, two hundred forty-four million, two hundred four thousand, six hundred eighty-one".