409654 has 16 divisors (see below), whose sum is σ = 727200. Its totient is φ = 169344.

The previous prime is 409639. The next prime is 409657. The reversal of 409654 is 456904.

It is an Ulam number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99 + ... + 910.

It is an arithmetic number, because the mean of its divisors is an integer number (45450).

2⁴⁰⁹⁶⁵⁴ is an apocalyptic number.

409654 is a deficient number, since it is larger than the sum of its proper divisors (317546).

409654 is a wasteful number, since it uses less digits than its factorization.

409654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 409654 is about 640.0421861096. The cubic root of 409654 is about 74.2686848115.

The spelling of 409654 in words is "four hundred nine thousand, six hundred fifty-four".