921086 has 4 divisors (see below), whose sum is σ = 1381632. Its totient is φ = 460542.

The previous prime is 921079. The next prime is 921091. The reversal of 921086 is 680129.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

921086 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230270 + ... + 230273.

It is an arithmetic number, because the mean of its divisors is an integer number (345408).

2⁹²¹⁰⁸⁶ is an apocalyptic number.

921086 is a deficient number, since it is larger than the sum of its proper divisors (460546).

921086 is a wasteful number, since it uses less digits than its factorization.

921086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460545.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 921086 is about 959.7322543293. The cubic root of 921086 is about 97.2971368296.

The spelling of 921086 in words is "nine hundred twenty-one thousand, eighty-six".