1640512 has 14 divisors (see below), whose sum is σ = 3255518. Its totient is φ = 820224.

The previous prime is 1640503. The next prime is 1640519. The reversal of 1640512 is 2150461.

It can be written as a sum of positive squares in only one way, i.e., 1308736 + 331776 = 1144^2 + 576^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1640512.

It is not an unprimeable number, because it can be changed into a prime (1640519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12753 + ... + 12880.

It is an arithmetic number, because the mean of its divisors is an integer number (232537).

2^1640512 is an apocalyptic number.

It is an amenable number.

1640512 is a deficient number, since it is larger than the sum of its proper divisors (1615006).

1640512 is an equidigital number, since it uses as much as digits as its factorization.

1640512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25645 (or 25635 counting only the distinct ones).

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

The square root of 1640512 is about 1280.8247343021. The cubic root of 1640512 is about 117.9396416392.

Adding to 1640512 its reverse (2150461), we get a palindrome (3790973).

The spelling of 1640512 in words is "one million, six hundred forty thousand, five hundred twelve".