9125561 has 2 divisors, whose sum is σ = 9125562. Its totient is φ = 9125560.

The previous prime is 9125531. The next prime is 9125573. The reversal of 9125561 is 1655219.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5953600 + 3171961 = 2440^2 + 1781^2 .

It is a cyclic number.

It is not a de Polignac number, because 9125561 - 2⁶ = 9125497 is a prime.

It is not a weakly prime, because it can be changed into another prime (9125521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4562780 + 4562781.

It is an arithmetic number, because the mean of its divisors is an integer number (4562781).

Almost surely, 2^9125561 is an apocalyptic number.

It is an amenable number.

9125561 is a deficient number, since it is larger than the sum of its proper divisors (1).

9125561 is an equidigital number, since it uses as much as digits as its factorization.

9125561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2700, while the sum is 29.

The square root of 9125561 is about 3020.8543493522. The cubic root of 9125561 is about 208.9712421227.

It can be divided in two parts, 91 and 25561, that added together give a palindrome (25652).

The spelling of 9125561 in words is "nine million, one hundred twenty-five thousand, five hundred sixty-one".