912661 has 4 divisors (see below), whose sum is σ = 916812. Its totient is φ = 908512.

The previous prime is 912649. The next prime is 912727. The reversal of 912661 is 166219.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 463761 + 448900 = 681^2 + 670^2 .

It is a cyclic number.

It is not a de Polignac number, because 912661 - 2⁷ = 912533 is a prime.

It is a Duffinian number.

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 912661.

It is not an unprimeable number, because it can be changed into a prime (912631) 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, 1726 + ... + 2191.

It is an arithmetic number, because the mean of its divisors is an integer number (229203).

2⁹¹²⁶⁶¹ is an apocalyptic number.

It is an amenable number.

912661 is a deficient number, since it is larger than the sum of its proper divisors (4151).

912661 is a wasteful number, since it uses less digits than its factorization.

912661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4150.

The product of its digits is 648, while the sum is 25.

The square root of 912661 is about 955.3329262618. The cubic root of 912661 is about 96.9995748733. Note that the first 3 decimals are identical.

The spelling of 912661 in words is "nine hundred twelve thousand, six hundred sixty-one".