1156398941 has 2 divisors, whose sum is σ = 1156398942. Its totient is φ = 1156398940.

The previous prime is 1156398937. The next prime is 1156398959. The reversal of 1156398941 is 1498936511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 820593316 + 335805625 = 28646^2 + 18325^2 .

It is an emirp because it is prime and its reverse (1498936511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1156398941 - 2² = 1156398937 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1156398931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578199470 + 578199471.

It is an arithmetic number, because the mean of its divisors is an integer number (578199471).

Almost surely, 2^1156398941 is an apocalyptic number.

It is an amenable number.

1156398941 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156398941 is an equidigital number, since it uses as much as digits as its factorization.

1156398941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 47.

The square root of 1156398941 is about 34005.8662733358. The cubic root of 1156398941 is about 1049.6291785031.

The spelling of 1156398941 in words is "one billion, one hundred fifty-six million, three hundred ninety-eight thousand, nine hundred forty-one".