921965 has 8 divisors (see below), whose sum is σ = 1207008. Its totient is φ = 670480.

The previous prime is 921959. The next prime is 921989. The reversal of 921965 is 569129.

921965 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 921965 - 2⁶ = 921901 is a prime.

It is a super-2 number, since 2×921965² = 1700038922450, which contains 22 as substring.

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 921965.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8327 + ... + 8436.

It is an arithmetic number, because the mean of its divisors is an integer number (150876).

2⁹²¹⁹⁶⁵ is an apocalyptic number.

It is an amenable number.

921965 is a deficient number, since it is larger than the sum of its proper divisors (285043).

921965 is a wasteful number, since it uses less digits than its factorization.

921965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16779.

The product of its digits is 4860, while the sum is 32.

The square root of 921965 is about 960.1900853477. The cubic root of 921965 is about 97.3280774773.

Subtracting from 921965 its reverse (569129), we obtain a square (352836 = 594²).

The spelling of 921965 in words is "nine hundred twenty-one thousand, nine hundred sixty-five".