40105249 has 4 divisors (see below), whose sum is σ = 40118164. Its totient is φ = 40092336.

The previous prime is 40105229. The next prime is 40105267. The reversal of 40105249 is 94250104.

40105249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 19009600 + 21095649 = 4360^2 + 4593^2 .

It is a cyclic number.

It is not a de Polignac number, because 40105249 - 2⁹ = 40104737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40105229) 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, 1339 + ... + 9055.

It is an arithmetic number, because the mean of its divisors is an integer number (10029541).

Almost surely, 2^40105249 is an apocalyptic number.

It is an amenable number.

40105249 is a deficient number, since it is larger than the sum of its proper divisors (12915).

40105249 is an equidigital number, since it uses as much as digits as its factorization.

40105249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12914.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 40105249 is about 6332.8705181774. The cubic root of 40105249 is about 342.2948820665.

The spelling of 40105249 in words is "forty million, one hundred five thousand, two hundred forty-nine".