1121542943 has 2 divisors, whose sum is σ = 1121542944. Its totient is φ = 1121542942.

The previous prime is 1121542901. The next prime is 1121542979. The reversal of 1121542943 is 3492451211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1121542943 - 2¹⁶ = 1121477407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121542243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560771471 + 560771472.

It is an arithmetic number, because the mean of its divisors is an integer number (560771472).

Almost surely, 2^1121542943 is an apocalyptic number.

1121542943 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121542943 is an equidigital number, since it uses as much as digits as its factorization.

1121542943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 32.

The square root of 1121542943 is about 33489.4452477195. The cubic root of 1121542943 is about 1038.9754897859.

The spelling of 1121542943 in words is "one billion, one hundred twenty-one million, five hundred forty-two thousand, nine hundred forty-three".