1154320553 has 8 divisors (see below), whose sum is σ = 1264367880. Its totient is φ = 1048956160.

The previous prime is 1154320543. The next prime is 1154320571. The reversal of 1154320553 is 3550234511.

It can be written as a sum of positive squares in 4 ways, for example, as 484132009 + 670188544 = 22003^2 + 25888^2 .

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 1154320553 - 2²² = 1150126249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1154320513) 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 7 ways as a sum of consecutive naturals, for example, 1170218 + ... + 1171203.

It is an arithmetic number, because the mean of its divisors is an integer number (158045985).

Almost surely, 2^1154320553 is an apocalyptic number.

It is an amenable number.

1154320553 is a deficient number, since it is larger than the sum of its proper divisors (110047327).

1154320553 is a wasteful number, since it uses less digits than its factorization.

1154320553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2341467.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 1154320553 is about 33975.2932732007. The cubic root of 1154320553 is about 1048.9999709197. Note that the first 4 decimals are identical.

The spelling of 1154320553 in words is "one billion, one hundred fifty-four million, three hundred twenty thousand, five hundred fifty-three".