671022725 has 12 divisors (see below), whose sum is σ = 881013924. Its totient is φ = 505240320.

The previous prime is 671022721. The next prime is 671022731. The reversal of 671022725 is 527220176.

It can be written as a sum of positive squares in 6 ways, for example, as 94206436 + 576816289 = 9706^2 + 24017^2 .

It is not a de Polignac number, because 671022725 - 2² = 671022721 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 671022691 and 671022700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671022721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 789014 + ... + 789863.

It is an arithmetic number, because the mean of its divisors is an integer number (73417827).

Almost surely, 2^671022725 is an apocalyptic number.

It is an amenable number.

671022725 is a deficient number, since it is larger than the sum of its proper divisors (209991199).

671022725 is a wasteful number, since it uses less digits than its factorization.

671022725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578904 (or 1578899 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 671022725 is about 25904.1063347107. The cubic root of 671022725 is about 875.4790193453.

The spelling of 671022725 in words is "six hundred seventy-one million, twenty-two thousand, seven hundred twenty-five".