105140649 has 8 divisors (see below), whose sum is σ = 141548992. Its totient is φ = 69413040.

The previous prime is 105140647. The next prime is 105140669. The reversal of 105140649 is 946041501.

It is a happy number.

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

It is not a de Polignac number, because 105140649 - 2¹ = 105140647 is a prime.

It is a super-2 number, since 2×105140649² = 22109112144282402, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (105140647) 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, 169822 + ... + 170439.

It is an arithmetic number, because the mean of its divisors is an integer number (17693624).

Almost surely, 2^105140649 is an apocalyptic number.

It is an amenable number.

105140649 is a deficient number, since it is larger than the sum of its proper divisors (36408343).

105140649 is a wasteful number, since it uses less digits than its factorization.

105140649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340367.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 105140649 is about 10253.8114377045. The cubic root of 105140649 is about 471.9799513293.

The spelling of 105140649 in words is "one hundred five million, one hundred forty thousand, six hundred forty-nine".