561296250 has 80 divisors (see below), whose sum is σ = 1558751040. Its totient is φ = 149670000.

The previous prime is 561296249. The next prime is 561296311. The reversal of 561296250 is 52692165.

561296250 is a `hidden beast` number, since 5 + 6 + 1 + 29 + 625 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 25435 + ... + 42065.

It is an arithmetic number, because the mean of its divisors is an integer number (19484388).

Almost surely, 2^561296250 is an apocalyptic number.

561296250 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 561296250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (779375520).

561296250 is an abundant number, since it is smaller than the sum of its proper divisors (997454790).

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

561296250 is a wasteful number, since it uses less digits than its factorization.

561296250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16662 (or 16641 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 561296250 is about 23691.6915816495. The cubic root of 561296250 is about 824.8925479890.

The spelling of 561296250 in words is "five hundred sixty-one million, two hundred ninety-six thousand, two hundred fifty".