1686115241 has 4 divisors (see below), whose sum is σ = 1686201300. Its totient is φ = 1686029184.

The previous prime is 1686115231. The next prime is 1686115243. The reversal of 1686115241 is 1425116861.

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 1265865241 + 420250000 = 35579^2 + 20500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1686115241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1686115243) 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 3 ways as a sum of consecutive naturals, for example, 2225 + ... + 58113.

It is an arithmetic number, because the mean of its divisors is an integer number (421550325).

Almost surely, 2^1686115241 is an apocalyptic number.

It is an amenable number.

1686115241 is a deficient number, since it is larger than the sum of its proper divisors (86059).

1686115241 is an equidigital number, since it uses as much as digits as its factorization.

1686115241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86058.

The product of its digits is 11520, while the sum is 35.

The square root of 1686115241 is about 41062.3336039247. Note that the first 3 decimals coincide. The cubic root of 1686115241 is about 1190.2250453557.

The spelling of 1686115241 in words is "one billion, six hundred eighty-six million, one hundred fifteen thousand, two hundred forty-one".