1145321 has 4 divisors (see below), whose sum is σ = 1149252. Its totient is φ = 1141392.

The previous prime is 1145311. The next prime is 1145323. The reversal of 1145321 is 1235411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1235411 = 313 ⋅3947.

It can be written as a sum of positive squares in 2 ways, for example, as 19600 + 1125721 = 140^2 + 1061^2 .

It is a cyclic number.

It is not a de Polignac number, because 1145321 - 2¹⁴ = 1128937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1145321.

It is not an unprimeable number, because it can be changed into a prime (1145323) 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, 1490 + ... + 2123.

It is an arithmetic number, because the mean of its divisors is an integer number (287313).

2^1145321 is an apocalyptic number.

It is an amenable number.

1145321 is a deficient number, since it is larger than the sum of its proper divisors (3931).

1145321 is an equidigital number, since it uses as much as digits as its factorization.

1145321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3930.

The product of its digits is 120, while the sum is 17.

The square root of 1145321 is about 1070.1967108901. The cubic root of 1145321 is about 104.6266711744.

The spelling of 1145321 in words is "one million, one hundred forty-five thousand, three hundred twenty-one".