598561 has 4 divisors (see below), whose sum is σ = 603972. Its totient is φ = 593152.

The previous prime is 598541. The next prime is 598571. The reversal of 598561 is 165895.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 165895 = 5 ⋅33179.

It can be written as a sum of positive squares in 2 ways, for example, as 207936 + 390625 = 456^2 + 625^2 .

It is a cyclic number.

It is not a de Polignac number, because 598561 - 2⁹ = 598049 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (598501) 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, 2536 + ... + 2761.

It is an arithmetic number, because the mean of its divisors is an integer number (150993).

2⁵⁹⁸⁵⁶¹ is an apocalyptic number.

It is an amenable number.

598561 is a deficient number, since it is larger than the sum of its proper divisors (5411).

598561 is a wasteful number, since it uses less digits than its factorization.

598561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5410.

The product of its digits is 10800, while the sum is 34.

The square root of 598561 is about 773.6672411315. The cubic root of 598561 is about 84.2757847976.

It can be divided in two parts, 5985 and 61, that multiplied together give a triangular number (365085 = T₈₅₄).

The spelling of 598561 in words is "five hundred ninety-eight thousand, five hundred sixty-one".