561140625 has 28 divisors (see below), whose sum is σ = 935300528. Its totient is φ = 299250000.

The previous prime is 561140621. The next prime is 561140651. The reversal of 561140625 is 526041165.

It is not a de Polignac number, because 561140625 - 2² = 561140621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 561140592 and 561140601.

It is not an unprimeable number, because it can be changed into a prime (561140621) 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 27 ways as a sum of consecutive naturals, for example, 40890 + ... + 52860.

Almost surely, 2^561140625 is an apocalyptic number.

It is an amenable number.

561140625 is a deficient number, since it is larger than the sum of its proper divisors (374159903).

561140625 is an frugal number, since it uses more digits than its factorization.

561140625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12004 (or 11979 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 561140625 is about 23688.4069747208. The cubic root of 561140625 is about 824.8163043720.

The spelling of 561140625 in words is "five hundred sixty-one million, one hundred forty thousand, six hundred twenty-five".