1241329181 has 2 divisors, whose sum is σ = 1241329182. Its totient is φ = 1241329180.

The previous prime is 1241329153. The next prime is 1241329183. The reversal of 1241329181 is 1819231421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1239744100 + 1585081 = 35210^2 + 1259^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1241329181 is a prime.

It is a super-2 number, since 2×1241329181² = 3081796271204261522, which contains 22 as substring.

Together with 1241329183, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1241329183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620664590 + 620664591.

It is an arithmetic number, because the mean of its divisors is an integer number (620664591).

Almost surely, 2^1241329181 is an apocalyptic number.

It is an amenable number.

1241329181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1241329181 is an equidigital number, since it uses as much as digits as its factorization.

1241329181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 32.

The square root of 1241329181 is about 35232.5017703824. The cubic root of 1241329181 is about 1074.7208017675.

The spelling of 1241329181 in words is "one billion, two hundred forty-one million, three hundred twenty-nine thousand, one hundred eighty-one".