104540521 has 2 divisors, whose sum is σ = 104540522. Its totient is φ = 104540520.

The previous prime is 104540479. The next prime is 104540551. The reversal of 104540521 is 125045401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84640000 + 19900521 = 9200^2 + 4461^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-104540521 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 104540492 and 104540501.

It is not a weakly prime, because it can be changed into another prime (104540551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52270260 + 52270261.

It is an arithmetic number, because the mean of its divisors is an integer number (52270261).

Almost surely, 2^104540521 is an apocalyptic number.

It is an amenable number.

104540521 is a deficient number, since it is larger than the sum of its proper divisors (1).

104540521 is an equidigital number, since it uses as much as digits as its factorization.

104540521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 104540521 is about 10224.5059049325. The cubic root of 104540521 is about 471.0802390033.

Adding to 104540521 its reverse (125045401), we get a palindrome (229585922).

The spelling of 104540521 in words is "one hundred four million, five hundred forty thousand, five hundred twenty-one".