1146388321 has 4 divisors (see below), whose sum is σ = 1234572052. Its totient is φ = 1058204592.

The previous prime is 1146388307. The next prime is 1146388337. The reversal of 1146388321 is 1238836411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1238836411 = 4409 ⋅280979.

It can be written as a sum of positive squares in 2 ways, for example, as 667653921 + 478734400 = 25839^2 + 21880^2 .

It is a cyclic number.

It is not a de Polignac number, because 1146388321 - 2⁵ = 1146388289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1146388391) 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, 44091846 + ... + 44091871.

It is an arithmetic number, because the mean of its divisors is an integer number (308643013).

Almost surely, 2^1146388321 is an apocalyptic number.

It is an amenable number.

1146388321 is a deficient number, since it is larger than the sum of its proper divisors (88183731).

1146388321 is an equidigital number, since it uses as much as digits as its factorization.

1146388321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88183730.

The product of its digits is 27648, while the sum is 37.

The square root of 1146388321 is about 33858.3567380344. The cubic root of 1146388321 is about 1046.5916150471.

The spelling of 1146388321 in words is "one billion, one hundred forty-six million, three hundred eighty-eight thousand, three hundred twenty-one".