561299 has 4 divisors (see below), whose sum is σ = 563160. Its totient is φ = 559440.

The previous prime is 561277. The next prime is 561307. The reversal of 561299 is 992165.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561299 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362 + ... + 1119.

It is an arithmetic number, because the mean of its divisors is an integer number (140790).

2⁵⁶¹²⁹⁹ is an apocalyptic number.

561299 is a deficient number, since it is larger than the sum of its proper divisors (1861).

561299 is a wasteful number, since it uses less digits than its factorization.

561299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1860.

The product of its digits is 4860, while the sum is 32.

The square root of 561299 is about 749.1989054984. The cubic root of 561299 is about 82.4893895139.

The spelling of 561299 in words is "five hundred sixty-one thousand, two hundred ninety-nine".