1163554121 has 2 divisors, whose sum is σ = 1163554122. Its totient is φ = 1163554120.

The previous prime is 1163554111. The next prime is 1163554123. The reversal of 1163554121 is 1214553611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1111555600 + 51998521 = 33340^2 + 7211^2 .

It is a cyclic number.

It is not a de Polignac number, because 1163554121 - 2⁶ = 1163554057 is a prime.

Together with 1163554123, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1163554123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 581777060 + 581777061.

It is an arithmetic number, because the mean of its divisors is an integer number (581777061).

Almost surely, 2^1163554121 is an apocalyptic number.

It is an amenable number.

1163554121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1163554121 is an equidigital number, since it uses as much as digits as its factorization.

1163554121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 29.

The square root of 1163554121 is about 34110.9091201041. The cubic root of 1163554121 is about 1051.7895773603.

It can be divided in two parts, 11635 and 54121, that added together give a palindrome (65756).

The spelling of 1163554121 in words is "one billion, one hundred sixty-three million, five hundred fifty-four thousand, one hundred twenty-one".