561126427 has 2 divisors, whose sum is σ = 561126428. Its totient is φ = 561126426.

The previous prime is 561126421. The next prime is 561126491. The reversal of 561126427 is 724621165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561126427 - 2⁷ = 561126299 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 561126392 and 561126401.

It is not a weakly prime, because it can be changed into another prime (561126421) 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 as a sum of consecutive naturals, namely, 280563213 + 280563214.

It is an arithmetic number, because the mean of its divisors is an integer number (280563214).

Almost surely, 2^561126427 is an apocalyptic number.

561126427 is a deficient number, since it is larger than the sum of its proper divisors (1).

561126427 is an equidigital number, since it uses as much as digits as its factorization.

561126427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 34.

The square root of 561126427 is about 23688.1072903683. The cubic root of 561126427 is about 824.8093478029.

The spelling of 561126427 in words is "five hundred sixty-one million, one hundred twenty-six thousand, four hundred twenty-seven".