104177561 has 4 divisors (see below), whose sum is σ = 105209124. Its totient is φ = 103146000.

The previous prime is 104177531. The next prime is 104177573. The reversal of 104177561 is 165771401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 165771401 = 101 ⋅1641301.

It can be written as a sum of positive squares in 2 ways, for example, as 56911936 + 47265625 = 7544^2 + 6875^2 .

It is a cyclic number.

It is not a de Polignac number, because 104177561 - 2¹⁸ = 103915417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (104177501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 515630 + ... + 515831.

It is an arithmetic number, because the mean of its divisors is an integer number (26302281).

Almost surely, 2^104177561 is an apocalyptic number.

It is an amenable number.

104177561 is a deficient number, since it is larger than the sum of its proper divisors (1031563).

104177561 is a wasteful number, since it uses less digits than its factorization.

104177561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1031562.

The product of its (nonzero) digits is 5880, while the sum is 32.

The square root of 104177561 is about 10206.7409587978. The cubic root of 104177561 is about 470.5344170050.

The spelling of 104177561 in words is "one hundred four million, one hundred seventy-seven thousand, five hundred sixty-one".