101045561 has 2 divisors, whose sum is σ = 101045562. Its totient is φ = 101045560.

The previous prime is 101045533. The next prime is 101045587. The reversal of 101045561 is 165540101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96904336 + 4141225 = 9844^2 + 2035^2 .

It is a cyclic number.

It is not a de Polignac number, because 101045561 - 2²² = 96851257 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (101044561) 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, 50522780 + 50522781.

It is an arithmetic number, because the mean of its divisors is an integer number (50522781).

Almost surely, 2^101045561 is an apocalyptic number.

It is an amenable number.

101045561 is a deficient number, since it is larger than the sum of its proper divisors (1).

101045561 is an equidigital number, since it uses as much as digits as its factorization.

101045561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 101045561 is about 10052.1421100181. The cubic root of 101045561 is about 465.7709659994.

Adding to 101045561 its reverse (165540101), we get a palindrome (266585662).

The spelling of 101045561 in words is "one hundred one million, forty-five thousand, five hundred sixty-one".