405240555 has 8 divisors (see below), whose sum is σ = 648384912. Its totient is φ = 216128288.

The previous prime is 405240553. The next prime is 405240559. The reversal of 405240555 is 555042504.

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 405240555 - 2¹ = 405240553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (405240551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13508004 + ... + 13508033.

It is an arithmetic number, because the mean of its divisors is an integer number (81048114).

Almost surely, 2^405240555 is an apocalyptic number.

405240555 is a deficient number, since it is larger than the sum of its proper divisors (243144357).

405240555 is a wasteful number, since it uses less digits than its factorization.

405240555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27016045.

The product of its (nonzero) digits is 20000, while the sum is 30.

The square root of 405240555 is about 20130.5875473122. The cubic root of 405240555 is about 740.0100771698.

The spelling of 405240555 in words is "four hundred five million, two hundred forty thousand, five hundred fifty-five".