1157941921 has 2 divisors, whose sum is σ = 1157941922. Its totient is φ = 1157941920.

The previous prime is 1157941919. The next prime is 1157941951. The reversal of 1157941921 is 1291497511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 716311696 + 441630225 = 26764^2 + 21015^2 .

It is a cyclic number.

It is not a de Polignac number, because 1157941921 - 2¹ = 1157941919 is a prime.

Together with 1157941919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1157941951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578970960 + 578970961.

It is an arithmetic number, because the mean of its divisors is an integer number (578970961).

Almost surely, 2^1157941921 is an apocalyptic number.

It is an amenable number.

1157941921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1157941921 is an equidigital number, since it uses as much as digits as its factorization.

1157941921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 40.

The square root of 1157941921 is about 34028.5456785917. The cubic root of 1157941921 is about 1050.0958101537.

The spelling of 1157941921 in words is "one billion, one hundred fifty-seven million, nine hundred forty-one thousand, nine hundred twenty-one".