561954 has 16 divisors (see below), whose sum is σ = 1140192. Its totient is φ = 184608.

The previous prime is 561947. The next prime is 561961. The reversal of 561954 is 459165.

It is an interprime number because it is at equal distance from previous prime (561947) and next prime (561961).

It is a Curzon number.

It is an unprimeable number.

561954 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204 + ... + 1079.

It is an arithmetic number, because the mean of its divisors is an integer number (71262).

2⁵⁶¹⁹⁵⁴ is an apocalyptic number.

561954 is an abundant number, since it is smaller than the sum of its proper divisors (578238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561954 is a wasteful number, since it uses less digits than its factorization.

561954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361.

The product of its digits is 5400, while the sum is 30.

The square root of 561954 is about 749.6359116264. The cubic root of 561954 is about 82.5214636532.

The spelling of 561954 in words is "five hundred sixty-one thousand, nine hundred fifty-four".