105255021 has 8 divisors (see below), whose sum is σ = 140765344. Its totient is φ = 69957360.

The previous prime is 105255019. The next prime is 105255023. The reversal of 105255021 is 120552501.

It is an interprime number because it is at equal distance from previous prime (105255019) and next prime (105255023).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 105255021 - 2¹ = 105255019 is a prime.

It is a super-2 number, since 2×105255021² = 22157238891420882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105255023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52006 + ... + 53991.

It is an arithmetic number, because the mean of its divisors is an integer number (17595668).

Almost surely, 2^105255021 is an apocalyptic number.

It is an amenable number.

105255021 is a deficient number, since it is larger than the sum of its proper divisors (35510323).

105255021 is a wasteful number, since it uses less digits than its factorization.

105255021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106331.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 105255021 is about 10259.3869699900. The cubic root of 105255021 is about 472.1510292448.

The spelling of 105255021 in words is "one hundred five million, two hundred fifty-five thousand, twenty-one".