105248021 has 2 divisors, whose sum is σ = 105248022. Its totient is φ = 105248020.

The previous prime is 105247991. The next prime is 105248029. The reversal of 105248021 is 120842501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65431921 + 39816100 = 8089^2 + 6310^2 .

It is a cyclic number.

It is not a de Polignac number, because 105248021 - 2⁶ = 105247957 is a prime.

It is a super-2 number, since 2×105248021² = 22154291848832882, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105248029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52624010 + 52624011.

It is an arithmetic number, because the mean of its divisors is an integer number (52624011).

Almost surely, 2^105248021 is an apocalyptic number.

It is an amenable number.

105248021 is a deficient number, since it is larger than the sum of its proper divisors (1).

105248021 is an equidigital number, since it uses as much as digits as its factorization.

105248021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 105248021 is about 10259.0458133298. The cubic root of 105248021 is about 472.1405621892.

It can be divided in two parts, 1052480 and 21, that added together give a palindrome (1052501).

The spelling of 105248021 in words is "one hundred five million, two hundred forty-eight thousand, twenty-one".