1244135161 has 2 divisors, whose sum is σ = 1244135162. Its totient is φ = 1244135160.

The previous prime is 1244135149. The next prime is 1244135173. The reversal of 1244135161 is 1615314421.

It is a balanced prime because it is at equal distance from previous prime (1244135149) and next prime (1244135173).

It can be written as a sum of positive squares in only one way, i.e., 1164925161 + 79210000 = 34131^2 + 8900^2 .

It is a cyclic number.

It is not a de Polignac number, because 1244135161 - 2⁵ = 1244135129 is a prime.

It is not a weakly prime, because it can be changed into another prime (1244135111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622067580 + 622067581.

It is an arithmetic number, because the mean of its divisors is an integer number (622067581).

Almost surely, 2^1244135161 is an apocalyptic number.

It is an amenable number.

1244135161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244135161 is an equidigital number, since it uses as much as digits as its factorization.

1244135161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 28.

The square root of 1244135161 is about 35272.3001943451. The cubic root of 1244135161 is about 1075.5299816150.

Adding to 1244135161 its reverse (1615314421), we get a palindrome (2859449582).

The spelling of 1244135161 in words is "one billion, two hundred forty-four million, one hundred thirty-five thousand, one hundred sixty-one".