1157242643 has 2 divisors, whose sum is σ = 1157242644. Its totient is φ = 1157242642.

The previous prime is 1157242637. The next prime is 1157242687. The reversal of 1157242643 is 3462427511.

It is a weak prime.

It is an emirp because it is prime and its reverse (3462427511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1157242643 - 2⁴ = 1157242627 is a prime.

It is not a weakly prime, because it can be changed into another prime (1157242613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578621321 + 578621322.

It is an arithmetic number, because the mean of its divisors is an integer number (578621322).

Almost surely, 2^1157242643 is an apocalyptic number.

1157242643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1157242643 is an equidigital number, since it uses as much as digits as its factorization.

1157242643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 35.

The square root of 1157242643 is about 34018.2692534467. The cubic root of 1157242643 is about 1049.8843842466.

The spelling of 1157242643 in words is "one billion, one hundred fifty-seven million, two hundred forty-two thousand, six hundred forty-three".