1244146181 has 2 divisors, whose sum is σ = 1244146182. Its totient is φ = 1244146180.

The previous prime is 1244146177. The next prime is 1244146247. The reversal of 1244146181 is 1816414421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1206520225 + 37625956 = 34735^2 + 6134^2 .

It is a cyclic number.

It is not a de Polignac number, because 1244146181 - 2² = 1244146177 is a prime.

It is a super-2 number, since 2×1244146181² = 3095799439393769522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1244146781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622073090 + 622073091.

It is an arithmetic number, because the mean of its divisors is an integer number (622073091).

Almost surely, 2^1244146181 is an apocalyptic number.

It is an amenable number.

1244146181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244146181 is an equidigital number, since it uses as much as digits as its factorization.

1244146181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6144, while the sum is 32.

The square root of 1244146181 is about 35272.4564072308. The cubic root of 1244146181 is about 1075.5331571289.

The spelling of 1244146181 in words is "one billion, two hundred forty-four million, one hundred forty-six thousand, one hundred eighty-one".