1155450121 has 8 divisors (see below), whose sum is σ = 1328423040. Its totient is φ = 984454368.

The previous prime is 1155450089. The next prime is 1155450133. The reversal of 1155450121 is 1210545511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1155450121 - 2⁵ = 1155450089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1155450181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 493036 + ... + 495373.

It is an arithmetic number, because the mean of its divisors is an integer number (166052880).

Almost surely, 2^1155450121 is an apocalyptic number.

It is an amenable number.

1155450121 is a deficient number, since it is larger than the sum of its proper divisors (172972919).

1155450121 is an equidigital number, since it uses as much as digits as its factorization.

1155450121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988583.

The product of its (nonzero) digits is 1000, while the sum is 25.

The square root of 1155450121 is about 33991.9125822599. The cubic root of 1155450121 is about 1049.3420279862.

Adding to 1155450121 its reverse (1210545511), we get a palindrome (2365995632).

The spelling of 1155450121 in words is "one billion, one hundred fifty-five million, four hundred fifty thousand, one hundred twenty-one".