105278057 has 4 divisors (see below), whose sum is σ = 106320516. Its totient is φ = 104235600.

The previous prime is 105278053. The next prime is 105278099. The reversal of 105278057 is 750872501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 100420441 + 4857616 = 10021^2 + 2204^2 .

It is a cyclic number.

It is not a de Polignac number, because 105278057 - 2² = 105278053 is a prime.

It is a super-3 number, since 3×105278057³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105278053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 521078 + ... + 521279.

It is an arithmetic number, because the mean of its divisors is an integer number (26580129).

Almost surely, 2^105278057 is an apocalyptic number.

It is an amenable number.

105278057 is a deficient number, since it is larger than the sum of its proper divisors (1042459).

105278057 is a wasteful number, since it uses less digits than its factorization.

105278057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042458.

The product of its (nonzero) digits is 19600, while the sum is 35.

The square root of 105278057 is about 10260.5095877349. The cubic root of 105278057 is about 472.1854715534.

The spelling of 105278057 in words is "one hundred five million, two hundred seventy-eight thousand, fifty-seven".