402285 has 16 divisors (see below), whose sum is σ = 693504. Its totient is φ = 197952.

The previous prime is 402277. The next prime is 402299. The reversal of 402285 is 582204.

It is not a de Polignac number, because 402285 - 2³ = 402277 is a prime.

It is an Ulam number.

It is a Curzon number.

402285 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 837 + ... + 1226.

It is an arithmetic number, because the mean of its divisors is an integer number (43344).

2⁴⁰²²⁸⁵ is an apocalyptic number.

It is an amenable number.

402285 is a deficient number, since it is larger than the sum of its proper divisors (291219).

402285 is a wasteful number, since it uses less digits than its factorization.

402285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2084.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 402285 is about 634.2594106515. The cubic root of 402285 is about 73.8206638620.

Adding to 402285 its reverse (582204), we get a palindrome (984489).

The spelling of 402285 in words is "four hundred two thousand, two hundred eighty-five".