988121 has 4 divisors (see below), whose sum is σ = 990132. Its totient is φ = 986112.

The previous prime is 988111. The next prime is 988129. The reversal of 988121 is 121889.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 855625 + 132496 = 925^2 + 364^2 .

It is a cyclic number.

It is not a de Polignac number, because 988121 - 2¹⁰ = 987097 is a prime.

It is a super-2 number, since 2×988121² = 1952766221282, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (988129) 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, 281 + ... + 1433.

It is an arithmetic number, because the mean of its divisors is an integer number (247533).

2⁹⁸⁸¹²¹ is an apocalyptic number.

It is an amenable number.

988121 is a deficient number, since it is larger than the sum of its proper divisors (2011).

988121 is a wasteful number, since it uses less digits than its factorization.

988121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2010.

The product of its digits is 1152, while the sum is 29.

The square root of 988121 is about 994.0427556197. The cubic root of 988121 is about 99.6024550074.

The spelling of 988121 in words is "nine hundred eighty-eight thousand, one hundred twenty-one".