561619 has 4 divisors (see below), whose sum is σ = 563296. Its totient is φ = 559944.

The previous prime is 561607. The next prime is 561667. The reversal of 561619 is 916165.

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

It is a cyclic number.

It is not a de Polignac number, because 561619 - 2¹¹ = 559571 is a prime.

It is a super-2 number, since 2×561619² = 630831802322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561019) 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, 144 + ... + 1069.

It is an arithmetic number, because the mean of its divisors is an integer number (140824).

2⁵⁶¹⁶¹⁹ is an apocalyptic number.

561619 is a deficient number, since it is larger than the sum of its proper divisors (1677).

561619 is a wasteful number, since it uses less digits than its factorization.

561619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1676.

The product of its digits is 1620, while the sum is 28.

The square root of 561619 is about 749.4124365128. The cubic root of 561619 is about 82.5050624380.

The spelling of 561619 in words is "five hundred sixty-one thousand, six hundred nineteen".