698121 has 6 divisors (see below), whose sum is σ = 1008410. Its totient is φ = 465408.

The previous prime is 698111. The next prime is 698171. The reversal of 698121 is 121896.

It can be written as a sum of positive squares in only one way, i.e., 585225 + 112896 = 765^2 + 336^2 .

It is not a de Polignac number, because 698121 - 2⁷ = 697993 is a prime.

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

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 698121.

It is not an unprimeable number, because it can be changed into a prime (698111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38776 + ... + 38793.

2⁶⁹⁸¹²¹ is an apocalyptic number.

It is an amenable number.

698121 is a deficient number, since it is larger than the sum of its proper divisors (310289).

698121 is a wasteful number, since it uses less digits than its factorization.

698121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77575 (or 77572 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 698121 is about 835.5363546848. The cubic root of 698121 is about 88.7108827150.

The spelling of 698121 in words is "six hundred ninety-eight thousand, one hundred twenty-one".