1241321761 has 2 divisors, whose sum is σ = 1241321762. Its totient is φ = 1241321760.

The previous prime is 1241321729. The next prime is 1241321779. The reversal of 1241321761 is 1671231421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 777350161 + 463971600 = 27881^2 + 21540^2 .

It is a cyclic number.

It is not a de Polignac number, because 1241321761 - 2⁵ = 1241321729 is a prime.

It is a super-2 number, since 2×1241321761² = 3081759428664282242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1241321161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620660880 + 620660881.

It is an arithmetic number, because the mean of its divisors is an integer number (620660881).

Almost surely, 2^1241321761 is an apocalyptic number.

It is an amenable number.

1241321761 is a deficient number, since it is larger than the sum of its proper divisors (1).

1241321761 is an equidigital number, since it uses as much as digits as its factorization.

1241321761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 28.

The square root of 1241321761 is about 35232.3964697266. The cubic root of 1241321761 is about 1074.7186603951.

The spelling of 1241321761 in words is "one billion, two hundred forty-one million, three hundred twenty-one thousand, seven hundred sixty-one".