402105 has 16 divisors (see below), whose sum is σ = 702144. Its totient is φ = 194880.

The previous prime is 402091. The next prime is 402107. The reversal of 402105 is 501204.

It is not a de Polignac number, because 402105 - 2⁴ = 402089 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (402107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1054 + ... + 1383.

It is an arithmetic number, because the mean of its divisors is an integer number (43884).

2⁴⁰²¹⁰⁵ is an apocalyptic number.

It is an amenable number.

402105 is a deficient number, since it is larger than the sum of its proper divisors (300039).

402105 is a wasteful number, since it uses less digits than its factorization.

402105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2456.

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 402105 is about 634.1174969988. The cubic root of 402105 is about 73.8096520157.

Adding to 402105 its reverse (501204), we get a palindrome (903309).

Subtracting 402105 from its reverse (501204), we obtain a palindrome (99099).

It can be divided in two parts, 40 and 2105, that added together give a triangular number (2145 = T₆₅).

The spelling of 402105 in words is "four hundred two thousand, one hundred five".