202420345 has 4 divisors (see below), whose sum is σ = 242904420. Its totient is φ = 161936272.

The previous prime is 202420331. The next prime is 202420367. The reversal of 202420345 is 543024202.

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

It can be written as a sum of positive squares in 2 ways, for example, as 159491641 + 42928704 = 12629^2 + 6552^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202420345 is a prime.

It is an unprimeable number.

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, 20242030 + ... + 20242039.

It is an arithmetic number, because the mean of its divisors is an integer number (60726105).

Almost surely, 2^202420345 is an apocalyptic number.

It is an amenable number.

202420345 is a deficient number, since it is larger than the sum of its proper divisors (40484075).

202420345 is an equidigital number, since it uses as much as digits as its factorization.

202420345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40484074.

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 202420345 is about 14227.4504040605. The cubic root of 202420345 is about 587.1531388472.

Adding to 202420345 its reverse (543024202), we get a palindrome (745444547).

The spelling of 202420345 in words is "two hundred two million, four hundred twenty thousand, three hundred forty-five".