1241456309 has 2 divisors, whose sum is σ = 1241456310. Its totient is φ = 1241456308.

The previous prime is 1241456239. The next prime is 1241456327. The reversal of 1241456309 is 9036541421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 726302500 + 515153809 = 26950^2 + 22697^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1241456309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1241456329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620728154 + 620728155.

It is an arithmetic number, because the mean of its divisors is an integer number (620728155).

Almost surely, 2^1241456309 is an apocalyptic number.

It is an amenable number.

1241456309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1241456309 is an equidigital number, since it uses as much as digits as its factorization.

1241456309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 1241456309 is about 35234.3058538124. The cubic root of 1241456309 is about 1074.7574889048.

The spelling of 1241456309 in words is "one billion, two hundred forty-one million, four hundred fifty-six thousand, three hundred nine".