671405425 has 6 divisors (see below), whose sum is σ = 832542758. Its totient is φ = 537124320.

The previous prime is 671405417. The next prime is 671405453. The reversal of 671405425 is 524504176.

It can be written as a sum of positive squares in 3 ways, for example, as 227376241 + 444029184 = 15079^2 + 21072^2 .

It is not a de Polignac number, because 671405425 - 2³ = 671405417 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13428084 + ... + 13428133.

Almost surely, 2^671405425 is an apocalyptic number.

It is an amenable number.

671405425 is a deficient number, since it is larger than the sum of its proper divisors (161137333).

671405425 is a wasteful number, since it uses less digits than its factorization.

671405425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26856227 (or 26856222 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 671405425 is about 25911.4921415190. The cubic root of 671405425 is about 875.6454231215.

The spelling of 671405425 in words is "six hundred seventy-one million, four hundred five thousand, four hundred twenty-five".