342249521 has 2 divisors, whose sum is σ = 342249522. Its totient is φ = 342249520.

The previous prime is 342249511. The next prime is 342249539. The reversal of 342249521 is 125942243.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 339480625 + 2768896 = 18425^2 + 1664^2 .

It is a cyclic number.

It is not a de Polignac number, because 342249521 - 2¹⁰ = 342248497 is a prime.

It is not a weakly prime, because it can be changed into another prime (342249511) 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 as a sum of consecutive naturals, namely, 171124760 + 171124761.

It is an arithmetic number, because the mean of its divisors is an integer number (171124761).

Almost surely, 2^342249521 is an apocalyptic number.

It is an amenable number.

342249521 is a deficient number, since it is larger than the sum of its proper divisors (1).

342249521 is an equidigital number, since it uses as much as digits as its factorization.

342249521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 32.

The square root of 342249521 is about 18499.9870540495. The cubic root of 342249521 is about 699.4890972707.

The spelling of 342249521 in words is "three hundred forty-two million, two hundred forty-nine thousand, five hundred twenty-one".