405000155 has 8 divisors (see below), whose sum is σ = 555428832. Its totient is φ = 277714368.

The previous prime is 405000139. The next prime is 405000157. The reversal of 405000155 is 551000504.

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 405000155 - 2⁴ = 405000139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (405000157) 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, 5785682 + ... + 5785751.

It is an arithmetic number, because the mean of its divisors is an integer number (69428604).

Almost surely, 2^405000155 is an apocalyptic number.

405000155 is a deficient number, since it is larger than the sum of its proper divisors (150428677).

405000155 is a wasteful number, since it uses less digits than its factorization.

405000155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11571445.

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 405000155 is about 20124.6156485037. The cubic root of 405000155 is about 739.8637166850.

Adding to 405000155 its reverse (551000504), we get a palindrome (956000659).

The spelling of 405000155 in words is "four hundred five million, one hundred fifty-five", and thus it is an aban number.