561502 has 4 divisors (see below), whose sum is σ = 842256. Its totient is φ = 280750.

The previous prime is 561461. The next prime is 561521. The reversal of 561502 is 205165.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 561502.

It is a congruent number.

It is an unprimeable number.

561502 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140374 + ... + 140377.

It is an arithmetic number, because the mean of its divisors is an integer number (210564).

2⁵⁶¹⁵⁰² is an apocalyptic number.

561502 is a deficient number, since it is larger than the sum of its proper divisors (280754).

561502 is a wasteful number, since it uses less digits than its factorization.

561502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280753.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 561502 is about 749.3343712923. The cubic root of 561502 is about 82.4993327158.

Adding to 561502 its reverse (205165), we get a palindrome (766667).

The spelling of 561502 in words is "five hundred sixty-one thousand, five hundred two".