1153444541 has 4 divisors (see below), whose sum is σ = 1153572672. Its totient is φ = 1153316412.

The previous prime is 1153444529. The next prime is 1153444613. The reversal of 1153444541 is 1454443511.

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: 1454443511 = 97 ⋅14994263.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1153444541 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1153444498 and 1153444507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1153443541) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 49451 + ... + 68936.

It is an arithmetic number, because the mean of its divisors is an integer number (288393168).

Almost surely, 2^1153444541 is an apocalyptic number.

It is an amenable number.

1153444541 is a deficient number, since it is larger than the sum of its proper divisors (128131).

1153444541 is an equidigital number, since it uses as much as digits as its factorization.

1153444541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128130.

The product of its digits is 19200, while the sum is 32.

The square root of 1153444541 is about 33962.3989288154. The cubic root of 1153444541 is about 1048.7345423037.

The spelling of 1153444541 in words is "one billion, one hundred fifty-three million, four hundred forty-four thousand, five hundred forty-one".