814661 has 4 divisors (see below), whose sum is σ = 816672. Its totient is φ = 812652.

The previous prime is 814643. The next prime is 814687. The reversal of 814661 is 166418.

814661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-814661 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 814661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (814601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161 + ... + 1286.

It is an arithmetic number, because the mean of its divisors is an integer number (204168).

2⁸¹⁴⁶⁶¹ is an apocalyptic number.

It is an amenable number.

814661 is a deficient number, since it is larger than the sum of its proper divisors (2011).

814661 is a wasteful number, since it uses less digits than its factorization.

814661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2010.

The product of its digits is 1152, while the sum is 26.

The square root of 814661 is about 902.5857300002. The cubic root of 814661 is about 93.3954334453.

The spelling of 814661 in words is "eight hundred fourteen thousand, six hundred sixty-one".