1241252381 has 2 divisors, whose sum is σ = 1241252382. Its totient is φ = 1241252380.

The previous prime is 1241252371. The next prime is 1241252393. The reversal of 1241252381 is 1832521421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 983136025 + 258116356 = 31355^2 + 16066^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1241252381 is a prime.

It is a super-2 number, since 2×1241252381² = 3081414946676338322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1241252321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620626190 + 620626191.

It is an arithmetic number, because the mean of its divisors is an integer number (620626191).

Almost surely, 2^1241252381 is an apocalyptic number.

It is an amenable number.

1241252381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1241252381 is an equidigital number, since it uses as much as digits as its factorization.

1241252381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3840, while the sum is 29.

The square root of 1241252381 is about 35231.4118507902. The cubic root of 1241252381 is about 1074.6986372842.

The spelling of 1241252381 in words is "one billion, two hundred forty-one million, two hundred fifty-two thousand, three hundred eighty-one".