405365605 has 8 divisors (see below), whose sum is σ = 486547992. Its totient is φ = 324219648.

The previous prime is 405365591. The next prime is 405365633. The reversal of 405365605 is 506563504.

It can be written as a sum of positive squares in 4 ways, for example, as 255008961 + 150356644 = 15969^2 + 12262^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 405365605 - 2¹³ = 405357413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33537 + ... + 43993.

It is an arithmetic number, because the mean of its divisors is an integer number (60818499).

Almost surely, 2^405365605 is an apocalyptic number.

It is an amenable number.

405365605 is a deficient number, since it is larger than the sum of its proper divisors (81182387).

405365605 is a wasteful number, since it uses less digits than its factorization.

405365605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18215.

The product of its (nonzero) digits is 54000, while the sum is 34.

The square root of 405365605 is about 20133.6932776875. The cubic root of 405365605 is about 740.0861873074.

The spelling of 405365605 in words is "four hundred five million, three hundred sixty-five thousand, six hundred five".