103561745 has 12 divisors (see below), whose sum is σ = 144564084. Its totient is φ = 71013600.

The previous prime is 103561741. The next prime is 103561763. The reversal of 103561745 is 547165301.

It can be written as a sum of positive squares in 2 ways, for example, as 12397441 + 91164304 = 3521^2 + 9548^2 .

It is not a de Polignac number, because 103561745 - 2² = 103561741 is a prime.

It is a super-3 number, since 3×103561745³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (103561741) 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 11 ways as a sum of consecutive naturals, for example, 211106 + ... + 211595.

It is an arithmetic number, because the mean of its divisors is an integer number (12047007).

Almost surely, 2^103561745 is an apocalyptic number.

It is an amenable number.

103561745 is a deficient number, since it is larger than the sum of its proper divisors (41002339).

103561745 is an equidigital number, since it uses as much as digits as its factorization.

103561745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422720 (or 422713 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 103561745 is about 10176.5291234291. The cubic root of 103561745 is about 469.6054407074.

The spelling of 103561745 in words is "one hundred three million, five hundred sixty-one thousand, seven hundred forty-five".