671021026 has 8 divisors (see below), whose sum is σ = 1083957084. Its totient is φ = 309702000.

The previous prime is 671021003. The next prime is 671021027. The reversal of 671021026 is 620120176.

It can be written as a sum of positive squares in 2 ways, for example, as 488365801 + 182655225 = 22099^2 + 13515^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (671021027) 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, 12904225 + ... + 12904276.

Almost surely, 2^671021026 is an apocalyptic number.

671021026 is a deficient number, since it is larger than the sum of its proper divisors (412936058).

671021026 is a wasteful number, since it uses less digits than its factorization.

671021026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25808516.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 671021026 is about 25904.0735406615. The cubic root of 671021026 is about 875.4782804533.

The spelling of 671021026 in words is "six hundred seventy-one million, twenty-one thousand, twenty-six".