104540581 has 2 divisors, whose sum is σ = 104540582. Its totient is φ = 104540580.

The previous prime is 104540567. The next prime is 104540609. The reversal of 104540581 is 185045401.

It is an a-pointer prime, because the next prime (104540609) can be obtained adding 104540581 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95238081 + 9302500 = 9759^2 + 3050^2 .

It is a cyclic number.

It is not a de Polignac number, because 104540581 - 2¹⁷ = 104409509 is a prime.

It is a super-2 number, since 2×104540581² = 21857466151635122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104540521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52270290 + 52270291.

It is an arithmetic number, because the mean of its divisors is an integer number (52270291).

Almost surely, 2^104540581 is an apocalyptic number.

It is an amenable number.

104540581 is a deficient number, since it is larger than the sum of its proper divisors (1).

104540581 is an equidigital number, since it uses as much as digits as its factorization.

104540581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 104540581 is about 10224.5088390592. The cubic root of 104540581 is about 471.0803291272.

Adding to 104540581 its reverse (185045401), we get a palindrome (289585982).

It can be divided in two parts, 10 and 4540581, that added together give a triangular number (4540591 = T₃₀₁₃).

The spelling of 104540581 in words is "one hundred four million, five hundred forty thousand, five hundred eighty-one".