105369521 has 2 divisors, whose sum is σ = 105369522. Its totient is φ = 105369520.

The previous prime is 105369431. The next prime is 105369529. The reversal of 105369521 is 125963501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83978896 + 21390625 = 9164^2 + 4625^2 .

It is a cyclic number.

It is not a de Polignac number, because 105369521 - 2¹⁸ = 105107377 is a prime.

It is a super-2 number, since 2×105369521² = 22205471911538882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (105369529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52684760 + 52684761.

It is an arithmetic number, because the mean of its divisors is an integer number (52684761).

Almost surely, 2^105369521 is an apocalyptic number.

It is an amenable number.

105369521 is a deficient number, since it is larger than the sum of its proper divisors (1).

105369521 is an equidigital number, since it uses as much as digits as its factorization.

105369521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 105369521 is about 10264.9657086617. The cubic root of 105369521 is about 472.3221745290.

The spelling of 105369521 in words is "one hundred five million, three hundred sixty-nine thousand, five hundred twenty-one".