671342251 has 4 divisors (see below), whose sum is σ = 672103432. Its totient is φ = 670581072.

The previous prime is 671342249. The next prime is 671342267. The reversal of 671342251 is 152243176.

671342251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 671342251 - 2¹ = 671342249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671342281) 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, 379266 + ... + 381031.

It is an arithmetic number, because the mean of its divisors is an integer number (168025858).

Almost surely, 2^671342251 is an apocalyptic number.

671342251 is a deficient number, since it is larger than the sum of its proper divisors (761181).

671342251 is an equidigital number, since it uses as much as digits as its factorization.

671342251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761180.

The product of its digits is 10080, while the sum is 31.

The square root of 671342251 is about 25910.2730784529. The cubic root of 671342251 is about 875.6179584646.

The spelling of 671342251 in words is "six hundred seventy-one million, three hundred forty-two thousand, two hundred fifty-one".