402105405 has 32 divisors (see below), whose sum is σ = 693834624. Its totient is φ = 197680896.

The previous prime is 402105401. The next prime is 402105413. The reversal of 402105405 is 504501204.

It is not a de Polignac number, because 402105405 - 2² = 402105401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402105401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 240382 + ... + 242048.

It is an arithmetic number, because the mean of its divisors is an integer number (21682332).

Almost surely, 2^402105405 is an apocalyptic number.

It is an amenable number.

402105405 is a deficient number, since it is larger than the sum of its proper divisors (291729219).

402105405 is a wasteful number, since it uses less digits than its factorization.

402105405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2925.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 402105405 is about 20052.5660452721. The cubic root of 402105405 is about 738.0967679604.

Adding to 402105405 its reverse (504501204), we get a palindrome (906606609).

The spelling of 402105405 in words is "four hundred two million, one hundred five thousand, four hundred five".