561124600 has 48 divisors (see below), whose sum is σ = 1314201600. Its totient is φ = 222800640.

The previous prime is 561124591. The next prime is 561124637. The reversal of 561124600 is 6421165.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 17161 + ... + 37639.

It is an arithmetic number, because the mean of its divisors is an integer number (27379200).

Almost surely, 2^561124600 is an apocalyptic number.

561124600 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561124600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (657100800).

561124600 is an abundant number, since it is smaller than the sum of its proper divisors (753077000).

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

561124600 is a wasteful number, since it uses less digits than its factorization.

561124600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20632 (or 20623 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 561124600 is about 23688.0687266818. The cubic root of 561124600 is about 824.8084526224.

Adding to 561124600 its reverse (6421165), we get a palindrome (567545765).

The spelling of 561124600 in words is "five hundred sixty-one million, one hundred twenty-four thousand, six hundred".