1154315321 has 4 divisors (see below), whose sum is σ = 1154934144. Its totient is φ = 1153696500.

The previous prime is 1154315311. The next prime is 1154315359. The reversal of 1154315321 is 1235134511.

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: 1235134511 = 13 ⋅95010347.

It is a cyclic number.

It is not a de Polignac number, because 1154315321 - 2⁶ = 1154315257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1154315311) 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, 306605 + ... + 310346.

It is an arithmetic number, because the mean of its divisors is an integer number (288733536).

Almost surely, 2^1154315321 is an apocalyptic number.

It is an amenable number.

1154315321 is a deficient number, since it is larger than the sum of its proper divisors (618823).

1154315321 is an equidigital number, since it uses as much as digits as its factorization.

1154315321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618822.

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

The square root of 1154315321 is about 33975.2162759856. The cubic root of 1154315321 is about 1048.9983860404.

Adding to 1154315321 its reverse (1235134511), we get a palindrome (2389449832).

The spelling of 1154315321 in words is "one billion, one hundred fifty-four million, three hundred fifteen thousand, three hundred twenty-one".