984921 has 8 divisors (see below), whose sum is σ = 1500864. Its totient is φ = 562800.

The previous prime is 984917. The next prime is 984923. The reversal of 984921 is 129489.

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

It is not a de Polignac number, because 984921 - 2² = 984917 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (984923) 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 7 ways as a sum of consecutive naturals, for example, 23430 + ... + 23471.

It is an arithmetic number, because the mean of its divisors is an integer number (187608).

2⁹⁸⁴⁹²¹ is an apocalyptic number.

It is an amenable number.

984921 is a deficient number, since it is larger than the sum of its proper divisors (515943).

984921 is a wasteful number, since it uses less digits than its factorization.

984921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46911.

The product of its digits is 5184, while the sum is 33.

The square root of 984921 is about 992.4318616409. The cubic root of 984921 is about 99.4948188846.

It can be divided in two parts, 9849 and 21, that added together give a triangular number (9870 = T₁₄₀).

The spelling of 984921 in words is "nine hundred eighty-four thousand, nine hundred twenty-one".