104132561 has 6 divisors (see below), whose sum is σ = 112759110. Its totient is φ = 96122208.

The previous prime is 104132557. The next prime is 104132573. The reversal of 104132561 is 165231401.

It can be written as a sum of positive squares in 3 ways, for example, as 10042561 + 94090000 = 3169^2 + 9700^2 .

It is not a de Polignac number, because 104132561 - 2² = 104132557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (104132261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 307916 + ... + 308253.

It is an arithmetic number, because the mean of its divisors is an integer number (18793185).

Almost surely, 2^104132561 is an apocalyptic number.

It is an amenable number.

104132561 is a deficient number, since it is larger than the sum of its proper divisors (8626549).

104132561 is an equidigital number, since it uses as much as digits as its factorization.

104132561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616195 (or 616182 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 104132561 is about 10204.5362951973. The cubic root of 104132561 is about 470.4666573773.

Adding to 104132561 its reverse (165231401), we get a palindrome (269363962).

The spelling of 104132561 in words is "one hundred four million, one hundred thirty-two thousand, five hundred sixty-one".