4145321 has 4 divisors (see below), whose sum is σ = 4149444. Its totient is φ = 4141200.

The previous prime is 4145299. The next prime is 4145333. The reversal of 4145321 is 1235414.

4145321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1235414 = 2 ⋅617707.

It can be written as a sum of positive squares in 2 ways, for example, as 4096 + 4141225 = 64^2 + 2035^2 .

It is a cyclic number.

It is not a de Polignac number, because 4145321 - 2⁶ = 4145257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4145293 and 4145302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4145341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 551 + ... + 2931.

It is an arithmetic number, because the mean of its divisors is an integer number (1037361).

Almost surely, 2^4145321 is an apocalyptic number.

It is an amenable number.

4145321 is a deficient number, since it is larger than the sum of its proper divisors (4123).

4145321 is a wasteful number, since it uses less digits than its factorization.

4145321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4122.

The product of its digits is 480, while the sum is 20.

The square root of 4145321 is about 2036.0061394799. The cubic root of 4145321 is about 160.6396399925.

The spelling of 4145321 in words is "four million, one hundred forty-five thousand, three hundred twenty-one".