406555745 has 8 divisors (see below), whose sum is σ = 488265000. Its totient is φ = 324979200.

The previous prime is 406555733. The next prime is 406555763. The reversal of 406555745 is 547555604.

It can be written as a sum of positive squares in 4 ways, for example, as 82591744 + 323964001 = 9088^2 + 17999^2 .

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

It is not a de Polignac number, because 406555745 - 2¹⁰ = 406554721 is a prime.

It is a Curzon 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, 26306 + ... + 38795.

It is an arithmetic number, because the mean of its divisors is an integer number (61033125).

Almost surely, 2^406555745 is an apocalyptic number.

It is an amenable number.

406555745 is a deficient number, since it is larger than the sum of its proper divisors (81709255).

406555745 is a wasteful number, since it uses less digits than its factorization.

406555745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66355.

The product of its (nonzero) digits is 420000, while the sum is 41.

The square root of 406555745 is about 20163.2275442202. The cubic root of 406555745 is about 740.8097691485.

The spelling of 406555745 in words is "four hundred six million, five hundred fifty-five thousand, seven hundred forty-five".