105148781 has 4 divisors (see below), whose sum is σ = 105360000. Its totient is φ = 104937564.

The previous prime is 105148759. The next prime is 105148787. The reversal of 105148781 is 187841501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 187841501 = 43 ⋅4368407.

It is a cyclic number.

It is not a de Polignac number, because 105148781 - 2¹⁴ = 105132397 is a prime.

It is a super-2 number, since 2×105148781² = 22112532291571922, 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 (105148787) 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, 104861 + ... + 105858.

It is an arithmetic number, because the mean of its divisors is an integer number (26340000).

Almost surely, 2^105148781 is an apocalyptic number.

It is an amenable number.

105148781 is a deficient number, since it is larger than the sum of its proper divisors (211219).

105148781 is an equidigital number, since it uses as much as digits as its factorization.

105148781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211218.

The product of its (nonzero) digits is 8960, while the sum is 35.

The square root of 105148781 is about 10254.2079655135. The cubic root of 105148781 is about 471.9921192905.

The spelling of 105148781 in words is "one hundred five million, one hundred forty-eight thousand, seven hundred eighty-one".