405654 has 32 divisors (see below), whose sum is σ = 889056. Its totient is φ = 122880.

The previous prime is 405641. The next prime is 405659. The reversal of 405654 is 456504.

405654 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 405654.

It is not an unprimeable number, because it can be changed into a prime (405659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4134 + ... + 4230.

It is an arithmetic number, because the mean of its divisors is an integer number (27783).

2⁴⁰⁵⁶⁵⁴ is an apocalyptic number.

405654 is an abundant number, since it is smaller than the sum of its proper divisors (483402).

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

405654 is a wasteful number, since it uses less digits than its factorization.

405654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 405654 is about 636.9097267274. The cubic root of 405654 is about 74.0261655705.

It can be divided in two parts, 4056 and 54, that multiplied together give a square (219024 = 468²).

The spelling of 405654 in words is "four hundred five thousand, six hundred fifty-four".