342521 has 2 divisors, whose sum is σ = 342522. Its totient is φ = 342520.

The previous prime is 342497. The next prime is 342527. The reversal of 342521 is 125243.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 287296 + 55225 = 536^2 + 235^2 .

It is an emirp because it is prime and its reverse (125243) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-342521 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 3⁷ + 4³ + 5⁷ + 2¹⁷ + 2¹⁷ + 1 .

It is a self number, because there is not a number n which added to its sum of digits gives 342521.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 342521.

It is not a weakly prime, because it can be changed into another prime (342527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171260 + 171261.

It is an arithmetic number, because the mean of its divisors is an integer number (171261).

2³⁴²⁵²¹ is an apocalyptic number.

It is an amenable number.

342521 is a deficient number, since it is larger than the sum of its proper divisors (1).

342521 is an equidigital number, since it uses as much as digits as its factorization.

342521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 240, while the sum is 17.

The square root of 342521 is about 585.2529367718. The cubic root of 342521 is about 69.9673997859.

Adding to 342521 its reverse (125243), we get a palindrome (467764).

It can be divided in two parts, 3 and 42521, that added together give a palindrome (42524).

The spelling of 342521 in words is "three hundred forty-two thousand, five hundred twenty-one".