921011 has 16 divisors (see below), whose sum is σ = 1176000. Its totient is φ = 701568.

The previous prime is 921007. The next prime is 921013. The reversal of 921011 is 110129.

It is not a de Polignac number, because 921011 - 2² = 921007 is a prime.

It is a super-2 number, since 2×921011² = 1696522524242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2465 + ... + 2813.

It is an arithmetic number, because the mean of its divisors is an integer number (73500).

2⁹²¹⁰¹¹ is an apocalyptic number.

921011 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

921011 is a deficient number, since it is larger than the sum of its proper divisors (254989).

921011 is a wasteful number, since it uses less digits than its factorization.

921011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 921011 is about 959.6931801362. The cubic root of 921011 is about 97.2944959313.

The spelling of 921011 in words is "nine hundred twenty-one thousand, eleven".