342503521 has 4 divisors (see below), whose sum is σ = 342551700. Its totient is φ = 342455344.

The previous prime is 342503509. The next prime is 342503533. The reversal of 342503521 is 125305243.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (342503509) and next prime (342503533).

It can be written as a sum of positive squares in 2 ways, for example, as 111007296 + 231496225 = 10536^2 + 15215^2 .

It is a cyclic number.

It is not a de Polignac number, because 342503521 - 2⁵ = 342503489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (342503321) 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, 11086 + ... + 28423.

It is an arithmetic number, because the mean of its divisors is an integer number (85637925).

Almost surely, 2^342503521 is an apocalyptic number.

It is an amenable number.

342503521 is a deficient number, since it is larger than the sum of its proper divisors (48179).

342503521 is an equidigital number, since it uses as much as digits as its factorization.

342503521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48178.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 342503521 is about 18506.8506505024. The cubic root of 342503521 is about 699.6620960970.

Adding to 342503521 its reverse (125305243), we get a palindrome (467808764).

The spelling of 342503521 in words is "three hundred forty-two million, five hundred three thousand, five hundred twenty-one".