405025505 has 8 divisors (see below), whose sum is σ = 486140712. Its totient is φ = 323947008.

The previous prime is 405025487. The next prime is 405025507. The reversal of 405025505 is 505520504.

It can be written as a sum of positive squares in 4 ways, for example, as 15673681 + 389351824 = 3959^2 + 19732^2 .

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 405025505 - 2⁶ = 405025441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405025507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31487 + ... + 42443.

It is an arithmetic number, because the mean of its divisors is an integer number (60767589).

Almost surely, 2^405025505 is an apocalyptic number.

It is an amenable number.

405025505 is a deficient number, since it is larger than the sum of its proper divisors (81115207).

405025505 is a wasteful number, since it uses less digits than its factorization.

405025505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18355.

The product of its (nonzero) digits is 5000, while the sum is 26.

The square root of 405025505 is about 20125.2454643415. The cubic root of 405025505 is about 739.8791530198.

The spelling of 405025505 in words is "four hundred five million, twenty-five thousand, five hundred five".