405140 has 24 divisors (see below), whose sum is σ = 870912. Its totient is φ = 158240.

The previous prime is 405091. The next prime is 405143. The reversal of 405140 is 41504.

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 405140.

It is not an unprimeable number, because it can be changed into a prime (405143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 725 + ... + 1155.

It is an arithmetic number, because the mean of its divisors is an integer number (36288).

2⁴⁰⁵¹⁴⁰ is an apocalyptic number.

It is an amenable number.

405140 is an abundant number, since it is smaller than the sum of its proper divisors (465772).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

405140 is a wasteful number, since it uses less digits than its factorization.

405140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487 (or 485 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 405140 is about 636.5060879520. The cubic root of 405140 is about 73.9948864253.

Adding to 405140 its reverse (41504), we get a palindrome (446644).

It can be divided in two parts, 405 and 140, that added together give a palindrome (545).

The spelling of 405140 in words is "four hundred five thousand, one hundred forty".