104851561 has 2 divisors, whose sum is σ = 104851562. Its totient is φ = 104851560.

The previous prime is 104851553. The next prime is 104851567. The reversal of 104851561 is 165158401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77352025 + 27499536 = 8795^2 + 5244^2 .

It is a cyclic number.

It is not a de Polignac number, because 104851561 - 2³ = 104851553 is a prime.

It is not a weakly prime, because it can be changed into another prime (104851567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52425780 + 52425781.

It is an arithmetic number, because the mean of its divisors is an integer number (52425781).

Almost surely, 2^104851561 is an apocalyptic number.

It is an amenable number.

104851561 is a deficient number, since it is larger than the sum of its proper divisors (1).

104851561 is an equidigital number, since it uses as much as digits as its factorization.

104851561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4800, while the sum is 31.

The square root of 104851561 is about 10239.7051227074. The cubic root of 104851561 is about 471.5469789722.

It can be divided in two parts, 1048515 and 61, that added together give a 20-th power (1048576 = 2²⁰).

The spelling of 104851561 in words is "one hundred four million, eight hundred fifty-one thousand, five hundred sixty-one".