1975641 has 4 divisors (see below), whose sum is σ = 2634192. Its totient is φ = 1317092.

The previous prime is 1975627. The next prime is 1975651. The reversal of 1975641 is 1465791.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1975641 - 2⁵ = 1975609 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1975651) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 329271 + ... + 329276.

It is an arithmetic number, because the mean of its divisors is an integer number (658548).

2^1975641 is an apocalyptic number.

It is an amenable number.

1975641 is a deficient number, since it is larger than the sum of its proper divisors (658551).

1975641 is an equidigital number, since it uses as much as digits as its factorization.

1975641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658550.

The product of its digits is 7560, while the sum is 33.

The square root of 1975641 is about 1405.5749713196. The cubic root of 1975641 is about 125.4785072425.

The spelling of 1975641 in words is "one million, nine hundred seventy-five thousand, six hundred forty-one".