671494145 has 16 divisors (see below), whose sum is σ = 922056960. Its totient is φ = 459877824.

The previous prime is 671494139. The next prime is 671494147. The reversal of 671494145 is 541494176.

It is not a de Polignac number, because 671494145 - 2¹² = 671490049 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (671494147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17444 + ... + 40586.

It is an arithmetic number, because the mean of its divisors is an integer number (57628560).

Almost surely, 2^671494145 is an apocalyptic number.

It is an amenable number.

671494145 is a deficient number, since it is larger than the sum of its proper divisors (250562815).

671494145 is a wasteful number, since it uses less digits than its factorization.

671494145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23984.

The product of its digits is 120960, while the sum is 41.

The square root of 671494145 is about 25913.2040666530. The cubic root of 671494145 is about 875.6839908966.

The spelling of 671494145 in words is "six hundred seventy-one million, four hundred ninety-four thousand, one hundred forty-five".