1669281925 has 12 divisors (see below), whose sum is σ = 2159906400. Its totient is φ = 1277363120.

The previous prime is 1669281883. The next prime is 1669281931. The reversal of 1669281925 is 5291829661.

It is not a de Polignac number, because 1669281925 - 2⁷ = 1669281797 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1450975 + ... + 1452124.

It is an arithmetic number, because the mean of its divisors is an integer number (179992200).

Almost surely, 2^1669281925 is an apocalyptic number.

It is an amenable number.

1669281925 is a deficient number, since it is larger than the sum of its proper divisors (490624475).

1669281925 is a wasteful number, since it uses less digits than its factorization.

1669281925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2903132 (or 2903127 counting only the distinct ones).

The product of its digits is 466560, while the sum is 49.

The square root of 1669281925 is about 40856.8467334424. The cubic root of 1669281925 is about 1186.2509237343.

The spelling of 1669281925 in words is "one billion, six hundred sixty-nine million, two hundred eighty-one thousand, nine hundred twenty-five".