671042545 has 8 divisors (see below), whose sum is σ = 827014824. Its totient is φ = 522324864.

The previous prime is 671042521. The next prime is 671042557. The reversal of 671042545 is 545240176.

It can be written as a sum of positive squares in 4 ways, for example, as 399320289 + 271722256 = 19983^2 + 16484^2 .

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 671042545 - 2⁷ = 671042417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 671042545.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1813444 + ... + 1813813.

It is an arithmetic number, because the mean of its divisors is an integer number (103376853).

Almost surely, 2^671042545 is an apocalyptic number.

It is an amenable number.

671042545 is a deficient number, since it is larger than the sum of its proper divisors (155972279).

671042545 is a wasteful number, since it uses less digits than its factorization.

671042545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3627299.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 671042545 is about 25904.4888967144. The cubic root of 671042545 is about 875.4876389358.

The spelling of 671042545 in words is "six hundred seventy-one million, forty-two thousand, five hundred forty-five".