4142321 has 4 divisors (see below), whose sum is σ = 4220532. Its totient is φ = 4064112.

The previous prime is 4142311. The next prime is 4142363. The reversal of 4142321 is 1232414.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1232414 = 2 ⋅616207.

It can be written as a sum of positive squares in 2 ways, for example, as 1132096 + 3010225 = 1064^2 + 1735^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4142321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4142321.

It is not an unprimeable number, because it can be changed into a prime (4142311) 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, 39026 + ... + 39131.

It is an arithmetic number, because the mean of its divisors is an integer number (1055133).

Almost surely, 2^4142321 is an apocalyptic number.

It is an amenable number.

4142321 is a deficient number, since it is larger than the sum of its proper divisors (78211).

4142321 is an equidigital number, since it uses as much as digits as its factorization.

4142321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78210.

The product of its digits is 192, while the sum is 17.

The square root of 4142321 is about 2035.2692696545. The cubic root of 4142321 is about 160.6008786016.

Adding to 4142321 its reverse (1232414), we get a palindrome (5374735).

The spelling of 4142321 in words is "four million, one hundred forty-two thousand, three hundred twenty-one".