678461 has 8 divisors (see below), whose sum is σ = 783744. Its totient is φ = 575280.

The previous prime is 678451. The next prime is 678463. The reversal of 678461 is 164876.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-678461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251 + ... + 1191.

It is an arithmetic number, because the mean of its divisors is an integer number (97968).

2⁶⁷⁸⁴⁶¹ is an apocalyptic number.

It is an amenable number.

678461 is a deficient number, since it is larger than the sum of its proper divisors (105283).

678461 is a wasteful number, since it uses less digits than its factorization.

678461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051.

The product of its digits is 8064, while the sum is 32.

The square root of 678461 is about 823.6874407201. The cubic root of 678461 is about 87.8702029315.

The spelling of 678461 in words is "six hundred seventy-eight thousand, four hundred sixty-one".