921955 has 8 divisors (see below), whose sum is σ = 1154592. Its totient is φ = 705408.

The previous prime is 921931. The next prime is 921959. The reversal of 921955 is 559129.

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 921955 - 2¹⁷ = 790883 is a prime.

It is a Duffinian number.

921955 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (921959) 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, 3894 + ... + 4123.

It is an arithmetic number, because the mean of its divisors is an integer number (144324).

2⁹²¹⁹⁵⁵ is an apocalyptic number.

921955 is a deficient number, since it is larger than the sum of its proper divisors (232637).

921955 is a wasteful number, since it uses less digits than its factorization.

921955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8045.

The product of its digits is 4050, while the sum is 31.

The square root of 921955 is about 960.1848780313. The cubic root of 921955 is about 97.3277255896.

The spelling of 921955 in words is "nine hundred twenty-one thousand, nine hundred fifty-five".