671245000 has 160 divisors (see below), whose sum is σ = 1708047000. Its totient is φ = 246272000.

The previous prime is 671244997. The next prime is 671245013. The reversal of 671245000 is 542176.

It can be written as a sum of positive squares in 20 ways, for example, as 234518596 + 436726404 = 15314^2 + 20898^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4504926 + ... + 4505074.

Almost surely, 2^671245000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671245000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (854023500).

671245000 is an abundant number, since it is smaller than the sum of its proper divisors (1036802000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

671245000 is a wasteful number, since it uses less digits than its factorization.

671245000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245 (or 226 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 671245000 is about 25908.3963224280. The cubic root of 671245000 is about 875.5756755931.

Adding to 671245000 its reverse (542176), we get a palindrome (671787176).

The spelling of 671245000 in words is "six hundred seventy-one million, two hundred forty-five thousand".