561479 has 4 divisors (see below), whose sum is σ = 563784. Its totient is φ = 559176.

The previous prime is 561461. The next prime is 561521. The reversal of 561479 is 974165.

It is a happy number.

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-561479 is a prime.

It is a super-3 number, since 3×561479³ = 531033364008315717, which contains 333 as substring.

It is a Duffinian number.

It is a congruent 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, 737 + ... + 1290.

It is an arithmetic number, because the mean of its divisors is an integer number (140946).

2⁵⁶¹⁴⁷⁹ is an apocalyptic number.

561479 is a deficient number, since it is larger than the sum of its proper divisors (2305).

561479 is a wasteful number, since it uses less digits than its factorization.

561479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2304.

The product of its digits is 7560, while the sum is 32.

The square root of 561479 is about 749.3190241813. The cubic root of 561479 is about 82.4982062665.

Subtracting 561479 from its reverse (974165), we obtain a triangular number (412686 = T₉₀₈).

The spelling of 561479 in words is "five hundred sixty-one thousand, four hundred seventy-nine".