561450 has 48 divisors (see below), whose sum is σ = 1473120. Its totient is φ = 141120.

The previous prime is 561439. The next prime is 561461. The reversal of 561450 is 54165.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (561439) and next prime (561461).

It is a super-2 number, since 2×561450² = 630452205000, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

561450 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 23 ways as a sum of consecutive naturals, for example, 2752 + ... + 2948.

It is an arithmetic number, because the mean of its divisors is an integer number (30690).

2⁵⁶¹⁴⁵⁰ is an apocalyptic number.

561450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 561450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (736560).

561450 is an abundant number, since it is smaller than the sum of its proper divisors (911670).

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

561450 is a wasteful number, since it uses less digits than its factorization.

561450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 226 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 561450 is about 749.2996730281. The cubic root of 561450 is about 82.4967859170.

The spelling of 561450 in words is "five hundred sixty-one thousand, four hundred fifty".