1145121533 has 4 divisors (see below), whose sum is σ = 1151519040. Its totient is φ = 1138724028.

The previous prime is 1145121529. The next prime is 1145121541. The reversal of 1145121533 is 3351215411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3351215411 = 709 ⋅4726679.

It is a cyclic number.

It is not a de Polignac number, because 1145121533 - 2² = 1145121529 is a prime.

It is a super-2 number, since 2×1145121533² = 2622606650680540178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145121833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3198485 + ... + 3198842.

It is an arithmetic number, because the mean of its divisors is an integer number (287879760).

Almost surely, 2^1145121533 is an apocalyptic number.

It is an amenable number.

1145121533 is a deficient number, since it is larger than the sum of its proper divisors (6397507).

1145121533 is an equidigital number, since it uses as much as digits as its factorization.

1145121533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6397506.

The product of its digits is 1800, while the sum is 26.

The square root of 1145121533 is about 33839.6443982498. The cubic root of 1145121533 is about 1046.2059695884.

Adding to 1145121533 its reverse (3351215411), we get a palindrome (4496336944).

The spelling of 1145121533 in words is "one billion, one hundred forty-five million, one hundred twenty-one thousand, five hundred thirty-three".