921671 has 8 divisors (see below), whose sum is σ = 979200. Its totient is φ = 865080.

The previous prime is 921667. The next prime is 921677. The reversal of 921671 is 176129.

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

It is a cyclic number.

It is not a de Polignac number, because 921671 - 2² = 921667 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 921671.

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 921671.

It is not an unprimeable number, because it can be changed into a prime (921677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3266 + ... + 3536.

It is an arithmetic number, because the mean of its divisors is an integer number (122400).

2⁹²¹⁶⁷¹ is an apocalyptic number.

921671 is a deficient number, since it is larger than the sum of its proper divisors (57529).

921671 is a wasteful number, since it uses less digits than its factorization.

921671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469.

The product of its digits is 756, while the sum is 26.

The square root of 921671 is about 960.0369784545. The cubic root of 921671 is about 97.3177309179.

The spelling of 921671 in words is "nine hundred twenty-one thousand, six hundred seventy-one".