561499 has 4 divisors (see below), whose sum is σ = 585936. Its totient is φ = 537064.

The previous prime is 561461. The next prime is 561521. The reversal of 561499 is 994165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 994165 = 5 ⋅198833.

It is a cyclic number.

It is not a de Polignac number, because 561499 - 2¹¹ = 559451 is a prime.

It is a super-2 number, since 2×561499² = 630562254002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561409) 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, 12184 + ... + 12229.

It is an arithmetic number, because the mean of its divisors is an integer number (146484).

2⁵⁶¹⁴⁹⁹ is an apocalyptic number.

561499 is a deficient number, since it is larger than the sum of its proper divisors (24437).

561499 is a wasteful number, since it uses less digits than its factorization.

561499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24436.

The product of its digits is 9720, while the sum is 34.

The square root of 561499 is about 749.3323695130. The cubic root of 561499 is about 82.4991857893.

It can be divided in two parts, 5 and 61499, that added together give a square (61504 = 248²).

The spelling of 561499 in words is "five hundred sixty-one thousand, four hundred ninety-nine".