561478 has 8 divisors (see below), whose sum is σ = 845568. Its totient is φ = 279624.

The previous prime is 561461. The next prime is 561521. The reversal of 561478 is 874165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 400 + ... + 1132.

It is an arithmetic number, because the mean of its divisors is an integer number (105696).

2⁵⁶¹⁴⁷⁸ is an apocalyptic number.

561478 is a deficient number, since it is larger than the sum of its proper divisors (284090).

561478 is a wasteful number, since it uses less digits than its factorization.

561478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118.

The product of its digits is 6720, while the sum is 31.

The square root of 561478 is about 749.3183569085. The cubic root of 561478 is about 82.4981572897.

The spelling of 561478 in words is "five hundred sixty-one thousand, four hundred seventy-eight".