1975091 has 2 divisors, whose sum is σ = 1975092. Its totient is φ = 1975090.

The previous prime is 1975073. The next prime is 1975117. The reversal of 1975091 is 1905791.

It is a weak prime.

It is an emirp because it is prime and its reverse (1905791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1975091 - 2⁶ = 1975027 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1975021) 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 as a sum of consecutive naturals, namely, 987545 + 987546.

It is an arithmetic number, because the mean of its divisors is an integer number (987546).

2^1975091 is an apocalyptic number.

1975091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1975091 is an equidigital number, since it uses as much as digits as its factorization.

1975091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2835, while the sum is 32.

The square root of 1975091 is about 1405.3793082296. The cubic root of 1975091 is about 125.4668621471.

The spelling of 1975091 in words is "one million, nine hundred seventy-five thousand, ninety-one".