1641025 has 12 divisors (see below), whose sum is σ = 2085804. Its totient is φ = 1280000.

The previous prime is 1641007. The next prime is 1641043. The reversal of 1641025 is 5201461.

It is an interprime number because it is at equal distance from previous prime (1641007) and next prime (1641043).

It can be written as a sum of positive squares in 6 ways, for example, as 5184 + 1635841 = 72^2 + 1279^2 .

It is not a de Polignac number, because 1641025 - 2¹¹ = 1638977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1640993 and 1641011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 225 + ... + 1825.

It is an arithmetic number, because the mean of its divisors is an integer number (173817).

2^1641025 is an apocalyptic number.

It is an amenable number.

1641025 is a deficient number, since it is larger than the sum of its proper divisors (444779).

1641025 is a wasteful number, since it uses less digits than its factorization.

1641025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1652 (or 1647 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1641025 is about 1281.0249802404. The cubic root of 1641025 is about 117.9519338851.

Adding to 1641025 its reverse (5201461), we get a palindrome (6842486).

It can be divided in two parts, 164 and 1025, that multiplied together give a square (168100 = 410²).

The spelling of 1641025 in words is "one million, six hundred forty-one thousand, twenty-five".