104521961 has 2 divisors, whose sum is σ = 104521962. Its totient is φ = 104521960.

The previous prime is 104521939. The next prime is 104521973. The reversal of 104521961 is 169125401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55591936 + 48930025 = 7456^2 + 6995^2 .

It is a cyclic number.

It is not a de Polignac number, because 104521961 - 2⁶ = 104521897 is a prime.

It is not a weakly prime, because it can be changed into another prime (104521061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52260980 + 52260981.

It is an arithmetic number, because the mean of its divisors is an integer number (52260981).

Almost surely, 2^104521961 is an apocalyptic number.

It is an amenable number.

104521961 is a deficient number, since it is larger than the sum of its proper divisors (1).

104521961 is an equidigital number, since it uses as much as digits as its factorization.

104521961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 104521961 is about 10223.5982413238. The cubic root of 104521961 is about 471.0523590111.

The spelling of 104521961 in words is "one hundred four million, five hundred twenty-one thousand, nine hundred sixty-one".