402345 has 12 divisors (see below), whose sum is σ = 697476. Its totient is φ = 214560.

The previous prime is 402343. The next prime is 402359. The reversal of 402345 is 543204.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 205209 + 197136 = 453^2 + 444^2 .

It is not a de Polignac number, because 402345 - 2¹ = 402343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (402341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4426 + ... + 4515.

It is an arithmetic number, because the mean of its divisors is an integer number (58123).

2⁴⁰²³⁴⁵ is an apocalyptic number.

402345 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

402345 is a deficient number, since it is larger than the sum of its proper divisors (295131).

402345 is a wasteful number, since it uses less digits than its factorization.

402345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8952 (or 8949 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 402345 is about 634.3067081468. The cubic root of 402345 is about 73.8243337475.

Adding to 402345 its reverse (543204), we get a palindrome (945549).

It can be divided in two parts, 402 and 345, that added together give a palindrome (747).

The spelling of 402345 in words is "four hundred two thousand, three hundred forty-five".