921098 has 8 divisors (see below), whose sum is σ = 1429380. Its totient is φ = 444640.

The previous prime is 921091. The next prime is 921121. The reversal of 921098 is 890129.

It can be written as a sum of positive squares in 2 ways, for example, as 851929 + 69169 = 923^2 + 263^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 921098.

It is not an unprimeable number, because it can be changed into a prime (921091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7883 + ... + 7998.

2⁹²¹⁰⁹⁸ is an apocalyptic number.

921098 is a deficient number, since it is larger than the sum of its proper divisors (508282).

921098 is a wasteful number, since it uses less digits than its factorization.

921098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15912.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 921098 is about 959.7385060526. The cubic root of 921098 is about 97.2975593600.

The spelling of 921098 in words is "nine hundred twenty-one thousand, ninety-eight".