1640125 has 8 divisors (see below), whose sum is σ = 2047032. Its totient is φ = 1312000.

The previous prime is 1640083. The next prime is 1640131. The reversal of 1640125 is 5210461.

It can be written as a sum of positive squares in 4 ways, for example, as 264196 + 1375929 = 514^2 + 1173^2 .

It is not a de Polignac number, because 1640125 - 2⁹ = 1639613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6436 + ... + 6685.

It is an arithmetic number, because the mean of its divisors is an integer number (255879).

2^1640125 is an apocalyptic number.

It is an amenable number.

1640125 is a deficient number, since it is larger than the sum of its proper divisors (406907).

1640125 is an equidigital number, since it uses as much as digits as its factorization.

1640125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13136 (or 13126 counting only the distinct ones).

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

The square root of 1640125 is about 1280.6736508572. The cubic root of 1640125 is about 117.9303668455.

Adding to 1640125 its reverse (5210461), we get a palindrome (6850586).

The spelling of 1640125 in words is "one million, six hundred forty thousand, one hundred twenty-five".