671272261 has 8 divisors (see below), whose sum is σ = 770839200. Its totient is φ = 578129040.

The previous prime is 671272229. The next prime is 671272271. The reversal of 671272261 is 162272176.

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 671272261 - 2⁵ = 671272229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671272271) 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 7 ways as a sum of consecutive naturals, for example, 1605706 + ... + 1606123.

It is an arithmetic number, because the mean of its divisors is an integer number (96354900).

Almost surely, 2^671272261 is an apocalyptic number.

It is an amenable number.

671272261 is a deficient number, since it is larger than the sum of its proper divisors (99566939).

671272261 is a wasteful number, since it uses less digits than its factorization.

671272261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3211859.

The product of its digits is 14112, while the sum is 34.

The square root of 671272261 is about 25908.9224206643. The cubic root of 671272261 is about 875.5875285655.

The spelling of 671272261 in words is "six hundred seventy-one million, two hundred seventy-two thousand, two hundred sixty-one".