1145121455 has 24 divisors (see below), whose sum is σ = 1408003632. Its totient is φ = 894022272.

The previous prime is 1145121407. The next prime is 1145121491. The reversal of 1145121455 is 5541215411.

It is not a de Polignac number, because 1145121455 - 2⁶ = 1145121391 is a prime.

It is a super-2 number, since 2×1145121455² = 2622606293402634050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3658379 + ... + 3658691.

It is an arithmetic number, because the mean of its divisors is an integer number (58666818).

Almost surely, 2^1145121455 is an apocalyptic number.

1145121455 is a deficient number, since it is larger than the sum of its proper divisors (262882177).

1145121455 is an equidigital number, since it uses as much as digits as its factorization.

1145121455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615 (or 548 counting only the distinct ones).

The product of its digits is 4000, while the sum is 29.

The square root of 1145121455 is about 33839.6432457554. The cubic root of 1145121455 is about 1046.2059458342.

Adding to 1145121455 its reverse (5541215411), we get a palindrome (6686336866).

The spelling of 1145121455 in words is "one billion, one hundred forty-five million, one hundred twenty-one thousand, four hundred fifty-five".