405087 has 4 divisors (see below), whose sum is σ = 540120. Its totient is φ = 270056.

The previous prime is 405073. The next prime is 405089. The reversal of 405087 is 780504.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 405087 - 2⁴ = 405071 is a prime.

It is a D-number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 405087.

It is not an unprimeable number, because it can be changed into a prime (405089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67512 + ... + 67517.

It is an arithmetic number, because the mean of its divisors is an integer number (135030).

2⁴⁰⁵⁰⁸⁷ is an apocalyptic number.

405087 is a deficient number, since it is larger than the sum of its proper divisors (135033).

405087 is a wasteful number, since it uses less digits than its factorization.

405087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135032.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 405087 is about 636.4644530530. The cubic root of 405087 is about 73.9916596395.

The spelling of 405087 in words is "four hundred five thousand, eighty-seven".