898521 has 8 divisors (see below), whose sum is σ = 1290240. Its totient is φ = 552912.

The previous prime is 898519. The next prime is 898523. The reversal of 898521 is 125898.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (898519) and next prime (898523).

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

It is not a de Polignac number, because 898521 - 2¹ = 898519 is a prime.

It is an Ulam number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (898523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11481 + ... + 11558.

It is an arithmetic number, because the mean of its divisors is an integer number (161280).

2⁸⁹⁸⁵²¹ is an apocalyptic number.

It is an amenable number.

898521 is a deficient number, since it is larger than the sum of its proper divisors (391719).

898521 is a wasteful number, since it uses less digits than its factorization.

898521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23055.

The product of its digits is 5760, while the sum is 33.

The square root of 898521 is about 947.9034760987. The cubic root of 898521 is about 96.4960221006.

The spelling of 898521 in words is "eight hundred ninety-eight thousand, five hundred twenty-one".