1155354121 has 2 divisors, whose sum is σ = 1155354122. Its totient is φ = 1155354120.

The previous prime is 1155354077. The next prime is 1155354127. The reversal of 1155354121 is 1214535511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 897302025 + 258052096 = 29955^2 + 16064^2 .

It is a cyclic number.

It is not a de Polignac number, because 1155354121 - 2²¹ = 1153256969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1155354121.

It is not a weakly prime, because it can be changed into another prime (1155354127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577677060 + 577677061.

It is an arithmetic number, because the mean of its divisors is an integer number (577677061).

Almost surely, 2^1155354121 is an apocalyptic number.

It is an amenable number.

1155354121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155354121 is an equidigital number, since it uses as much as digits as its factorization.

1155354121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3000, while the sum is 28.

The square root of 1155354121 is about 33990.5004523323. The cubic root of 1155354121 is about 1049.3129658274.

Adding to 1155354121 its reverse (1214535511), we get a palindrome (2369889632).

The spelling of 1155354121 in words is "one billion, one hundred fifty-five million, three hundred fifty-four thousand, one hundred twenty-one".