1641925 has 6 divisors (see below), whose sum is σ = 2036018. Its totient is φ = 1313520.

The previous prime is 1641917. The next prime is 1641929. The reversal of 1641925 is 5291461.

It can be written as a sum of positive squares in 3 ways, for example, as 6084 + 1635841 = 78^2 + 1279^2 .

It is not a de Polignac number, because 1641925 - 2³ = 1641917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1641893 and 1641902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641929) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32814 + ... + 32863.

2^1641925 is an apocalyptic number.

It is an amenable number.

1641925 is a deficient number, since it is larger than the sum of its proper divisors (394093).

1641925 is an equidigital number, since it uses as much as digits as its factorization.

1641925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65687 (or 65682 counting only the distinct ones).

The product of its digits is 2160, while the sum is 28.

The square root of 1641925 is about 1281.3762132957. The cubic root of 1641925 is about 117.9734930406.

The spelling of 1641925 in words is "one million, six hundred forty-one thousand, nine hundred twenty-five".