402365 has 4 divisors (see below), whose sum is σ = 482844. Its totient is φ = 321888.

The previous prime is 402361. The next prime is 402371. The reversal of 402365 is 563204.

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 196249 + 206116 = 443^2 + 454^2 .

It is a cyclic number.

It is not a de Polignac number, because 402365 - 2² = 402361 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 402365.

It is not an unprimeable number, because it can be changed into a prime (402361) 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, 40232 + ... + 40241.

It is an arithmetic number, because the mean of its divisors is an integer number (120711).

2⁴⁰²³⁶⁵ is an apocalyptic number.

It is an amenable number.

402365 is a deficient number, since it is larger than the sum of its proper divisors (80479).

402365 is an equidigital number, since it uses as much as digits as its factorization.

402365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80478.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 402365 is about 634.3224731948. The cubic root of 402365 is about 73.8255569616.

Adding to 402365 its reverse (563204), we get a palindrome (965569).

It can be divided in two parts, 402 and 365, that added together give a palindrome (767).

The spelling of 402365 in words is "four hundred two thousand, three hundred sixty-five".