40686141 has 4 divisors (see below), whose sum is σ = 54248192. Its totient is φ = 27124092.

The previous prime is 40686131. The next prime is 40686143. The reversal of 40686141 is 14168604.

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.

It is not a de Polignac number, because 40686141 - 2⁶ = 40686077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40686099 and 40686108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40686143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6781021 + ... + 6781026.

It is an arithmetic number, because the mean of its divisors is an integer number (13562048).

Almost surely, 2^40686141 is an apocalyptic number.

It is an amenable number.

40686141 is a deficient number, since it is larger than the sum of its proper divisors (13562051).

40686141 is a wasteful number, since it uses less digits than its factorization.

40686141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13562050.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 40686141 is about 6378.5688833782. The cubic root of 40686141 is about 343.9395879355.

The spelling of 40686141 in words is "forty million, six hundred eighty-six thousand, one hundred forty-one".