1975651 has 2 divisors, whose sum is σ = 1975652. Its totient is φ = 1975650.

The previous prime is 1975627. The next prime is 1975657. The reversal of 1975651 is 1565791.

It is a strong prime.

It is an emirp because it is prime and its reverse (1565791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1975651 - 2⁵ = 1975619 is a prime.

It is not a weakly prime, because it can be changed into another prime (1975657) 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, 987825 + 987826.

It is an arithmetic number, because the mean of its divisors is an integer number (987826).

2^1975651 is an apocalyptic number.

1975651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1975651 is an equidigital number, since it uses as much as digits as its factorization.

1975651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9450, while the sum is 34.

The square root of 1975651 is about 1405.5785285782. The cubic root of 1975651 is about 125.4787189515.

The spelling of 1975651 in words is "one million, nine hundred seventy-five thousand, six hundred fifty-one".