671542841 has 8 divisors (see below), whose sum is σ = 686774760. Its totient is φ = 656474112.

The previous prime is 671542829. The next prime is 671542843. The reversal of 671542841 is 148245176.

It can be written as a sum of positive squares in 4 ways, for example, as 525625 + 671017216 = 725^2 + 25904^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 671542841 - 2²² = 667348537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 671542795 and 671542804.

It is not an unprimeable number, because it can be changed into a prime (671542843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32456 + ... + 48953.

It is an arithmetic number, because the mean of its divisors is an integer number (85846845).

Almost surely, 2^671542841 is an apocalyptic number.

It is an amenable number.

671542841 is a deficient number, since it is larger than the sum of its proper divisors (15231919).

671542841 is a wasteful number, since it uses less digits than its factorization.

671542841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81595.

The product of its digits is 53760, while the sum is 38.

The square root of 671542841 is about 25914.1436478229. The cubic root of 671542841 is about 875.7051582576.

The spelling of 671542841 in words is "six hundred seventy-one million, five hundred forty-two thousand, eight hundred forty-one".