1640875 has 8 divisors (see below), whose sum is σ = 2047968. Its totient is φ = 1312600.

The previous prime is 1640869. The next prime is 1640879. The reversal of 1640875 is 5780461.

It is not a de Polignac number, because 1640875 - 2¹⁵ = 1608107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1640879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6439 + ... + 6688.

It is an arithmetic number, because the mean of its divisors is an integer number (255996).

2^1640875 is an apocalyptic number.

1640875 is a deficient number, since it is larger than the sum of its proper divisors (407093).

1640875 is an equidigital number, since it uses as much as digits as its factorization.

1640875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13142 (or 13132 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 1640875 is about 1280.9664320348. The cubic root of 1640875 is about 117.9483399262.

The spelling of 1640875 in words is "one million, six hundred forty thousand, eight hundred seventy-five".