1241765381 has 2 divisors, whose sum is σ = 1241765382. Its totient is φ = 1241765380.

The previous prime is 1241765359. The next prime is 1241765431. The reversal of 1241765381 is 1835671421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1241434756 + 330625 = 35234^2 + 575^2 .

It is a cyclic number.

It is not a de Polignac number, because 1241765381 - 2¹⁴ = 1241748997 is a prime.

It is a super-3 number, since 3×1241765381³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1241765321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620882690 + 620882691.

It is an arithmetic number, because the mean of its divisors is an integer number (620882691).

Almost surely, 2^1241765381 is an apocalyptic number.

It is an amenable number.

1241765381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1241765381 is an equidigital number, since it uses as much as digits as its factorization.

1241765381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 38.

The square root of 1241765381 is about 35238.6915335970. The cubic root of 1241765381 is about 1074.8466717679.

The spelling of 1241765381 in words is "one billion, two hundred forty-one million, seven hundred sixty-five thousand, three hundred eighty-one".