1121654243 has 2 divisors, whose sum is σ = 1121654244. Its totient is φ = 1121654242.

The previous prime is 1121654207. The next prime is 1121654249. The reversal of 1121654243 is 3424561211.

It is a strong prime.

It is an emirp because it is prime and its reverse (3424561211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1121654243 - 2¹⁶ = 1121588707 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121654249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560827121 + 560827122.

It is an arithmetic number, because the mean of its divisors is an integer number (560827122).

Almost surely, 2^1121654243 is an apocalyptic number.

1121654243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121654243 is an equidigital number, since it uses as much as digits as its factorization.

1121654243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 29.

The square root of 1121654243 is about 33491.1069240776. The cubic root of 1121654243 is about 1039.0098573649.

The spelling of 1121654243 in words is "one billion, one hundred twenty-one million, six hundred fifty-four thousand, two hundred forty-three".