405402105 has 16 divisors (see below), whose sum is σ = 648933120. Its totient is φ = 216117888.

The previous prime is 405402073. The next prime is 405402121. The reversal of 405402105 is 501204504.

It is not a de Polignac number, because 405402105 - 2⁵ = 405402073 is a prime.

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, 39984 + ... + 49086.

It is an arithmetic number, because the mean of its divisors is an integer number (40558320).

Almost surely, 2^405402105 is an apocalyptic number.

It is an amenable number.

405402105 is a deficient number, since it is larger than the sum of its proper divisors (243531015).

405402105 is a wasteful number, since it uses less digits than its factorization.

405402105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12080.

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

The square root of 405402105 is about 20134.5996980322. The cubic root of 405402105 is about 740.1083996303.

Adding to 405402105 its reverse (501204504), we get a palindrome (906606609).

The spelling of 405402105 in words is "four hundred five million, four hundred two thousand, one hundred five".