1641000425 has 12 divisors (see below), whose sum is σ = 2035351500. Its totient is φ = 1312470720.

The previous prime is 1641000421. The next prime is 1641000437. The reversal of 1641000425 is 5240001461.

It can be written as a sum of positive squares in 6 ways, for example, as 426409 + 1640574016 = 653^2 + 40504^2 .

It is not a de Polignac number, because 1641000425 - 2² = 1641000421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1641000425.

It is not an unprimeable number, because it can be changed into a prime (1641000421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 163451 + ... + 173199.

It is an arithmetic number, because the mean of its divisors is an integer number (169612625).

Almost surely, 2^1641000425 is an apocalyptic number.

It is an amenable number.

1641000425 is a deficient number, since it is larger than the sum of its proper divisors (394351075).

1641000425 is an equidigital number, since it uses as much as digits as its factorization.

1641000425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16492 (or 16487 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1641000425 is about 40509.2634467723. The cubic root of 1641000425 is about 1179.5134508979.

Adding to 1641000425 its reverse (5240001461), we get a palindrome (6881001886).

The spelling of 1641000425 in words is "one billion, six hundred forty-one million, four hundred twenty-five", and thus it is an aban number.