561025101 has 16 divisors (see below), whose sum is σ = 920657024. Its totient is φ = 295925184.

The previous prime is 561025061. The next prime is 561025123. The reversal of 561025101 is 101520165.

It is not a de Polignac number, because 561025101 - 2⁹ = 561024589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561025151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1027246 + ... + 1027791.

It is an arithmetic number, because the mean of its divisors is an integer number (57541064).

Almost surely, 2^561025101 is an apocalyptic number.

It is an amenable number.

561025101 is a deficient number, since it is larger than the sum of its proper divisors (359631923).

561025101 is a wasteful number, since it uses less digits than its factorization.

561025101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2055060.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 561025101 is about 23685.9684412523. The cubic root of 561025101 is about 824.7596978731.

Adding to 561025101 its reverse (101520165), we get a palindrome (662545266).

The spelling of 561025101 in words is "five hundred sixty-one million, twenty-five thousand, one hundred one".