1152478321 has 4 divisors (see below), whose sum is σ = 1153032100. Its totient is φ = 1151924544.

The previous prime is 1152478291. The next prime is 1152478343. The reversal of 1152478321 is 1238742511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1025600625 + 126877696 = 32025^2 + 11264^2 .

It is a cyclic number.

It is not a de Polignac number, because 1152478321 - 2¹³ = 1152470129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1152478121) 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, 273756 + ... + 277933.

It is an arithmetic number, because the mean of its divisors is an integer number (288258025).

Almost surely, 2^1152478321 is an apocalyptic number.

It is an amenable number.

1152478321 is a deficient number, since it is larger than the sum of its proper divisors (553779).

1152478321 is an equidigital number, since it uses as much as digits as its factorization.

1152478321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553778.

The product of its digits is 13440, while the sum is 34.

The square root of 1152478321 is about 33948.1710994863. The cubic root of 1152478321 is about 1048.4416250665.

The spelling of 1152478321 in words is "one billion, one hundred fifty-two million, four hundred seventy-eight thousand, three hundred twenty-one".