561304 has 8 divisors (see below), whose sum is σ = 1052460. Its totient is φ = 280648.

The previous prime is 561277. The next prime is 561307. The reversal of 561304 is 403165.

561304 is nontrivially palindromic in base 16.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561307) by changing a digit.

561304 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, 35074 + ... + 35089.

2⁵⁶¹³⁰⁴ is an apocalyptic number.

It is an amenable number.

561304 is a deficient number, since it is larger than the sum of its proper divisors (491156).

561304 is a wasteful number, since it uses less digits than its factorization.

561304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70169 (or 70165 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 561304 is about 749.2022423885. The cubic root of 561304 is about 82.4896344491.

Adding to 561304 its reverse (403165), we get a palindrome (964469).

The spelling of 561304 in words is "five hundred sixty-one thousand, three hundred four".