10027561 has 2 divisors, whose sum is σ = 10027562. Its totient is φ = 10027560.

The previous prime is 10027559. The next prime is 10027571. The reversal of 10027561 is 16572001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6859161 + 3168400 = 2619^2 + 1780^2 .

It is a cyclic number.

It is not a de Polignac number, because 10027561 - 2¹ = 10027559 is a prime.

Together with 10027559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (10027531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5013780 + 5013781.

It is an arithmetic number, because the mean of its divisors is an integer number (5013781).

Almost surely, 2^10027561 is an apocalyptic number.

It is an amenable number.

10027561 is a deficient number, since it is larger than the sum of its proper divisors (1).

10027561 is an equidigital number, since it uses as much as digits as its factorization.

10027561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 10027561 is about 3166.6324384115. The cubic root of 10027561 is about 215.6412153597.

Adding to 10027561 its reverse (16572001), we get a palindrome (26599562).

The spelling of 10027561 in words is "ten million, twenty-seven thousand, five hundred sixty-one".