402205345 has 4 divisors (see below), whose sum is σ = 482646420. Its totient is φ = 321764272.

The previous prime is 402205343. The next prime is 402205361. The reversal of 402205345 is 543502204.

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 275327649 + 126877696 = 16593^2 + 11264^2 .

It is a cyclic number.

It is not a de Polignac number, because 402205345 - 2¹ = 402205343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (402205343) 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, 40220530 + ... + 40220539.

It is an arithmetic number, because the mean of its divisors is an integer number (120661605).

Almost surely, 2^402205345 is an apocalyptic number.

It is an amenable number.

402205345 is a deficient number, since it is larger than the sum of its proper divisors (80441075).

402205345 is an equidigital number, since it uses as much as digits as its factorization.

402205345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80441074.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 402205345 is about 20055.0578408540. The cubic root of 402205345 is about 738.1579121941.

Adding to 402205345 its reverse (543502204), we get a palindrome (945707549).

The spelling of 402205345 in words is "four hundred two million, two hundred five thousand, three hundred forty-five".