561149 has 4 divisors (see below), whose sum is σ = 570720. Its totient is φ = 551580.

The previous prime is 561109. The next prime is 561161. The reversal of 561149 is 941165.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 561149 - 2⁸ = 560893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4697 + ... + 4814.

It is an arithmetic number, because the mean of its divisors is an integer number (142680).

2⁵⁶¹¹⁴⁹ is an apocalyptic number.

561149 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

561149 is a deficient number, since it is larger than the sum of its proper divisors (9571).

561149 is an equidigital number, since it uses as much as digits as its factorization.

561149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9570.

The product of its digits is 1080, while the sum is 26.

The square root of 561149 is about 749.0987918826. The cubic root of 561149 is about 82.4820407801.

The spelling of 561149 in words is "five hundred sixty-one thousand, one hundred forty-nine".