104651021 has 2 divisors, whose sum is σ = 104651022. Its totient is φ = 104651020.

The previous prime is 104651017. The next prime is 104651077. The reversal of 104651021 is 120156401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71588521 + 33062500 = 8461^2 + 5750^2 .

It is a cyclic number.

It is not a de Polignac number, because 104651021 - 2² = 104651017 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 104650984 and 104651002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104651011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52325510 + 52325511.

It is an arithmetic number, because the mean of its divisors is an integer number (52325511).

Almost surely, 2^104651021 is an apocalyptic number.

It is an amenable number.

104651021 is a deficient number, since it is larger than the sum of its proper divisors (1).

104651021 is an equidigital number, since it uses as much as digits as its factorization.

104651021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 104651021 is about 10229.9081618556. The cubic root of 104651021 is about 471.2461588338.

The spelling of 104651021 in words is "one hundred four million, six hundred fifty-one thousand, twenty-one".