1975994 has 4 divisors (see below), whose sum is σ = 2963994. Its totient is φ = 987996.

The previous prime is 1975991. The next prime is 1975997. The reversal of 1975994 is 4995791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4995791 = 97 ⋅51503.

It is an interprime number because it is at equal distance from previous prime (1975991) and next prime (1975997).

It can be written as a sum of positive squares in only one way, i.e., 1600225 + 375769 = 1265^2 + 613^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1975991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493997 + ... + 494000.

2^1975994 is an apocalyptic number.

1975994 is a deficient number, since it is larger than the sum of its proper divisors (988000).

1975994 is an equidigital number, since it uses as much as digits as its factorization.

1975994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987999.

The product of its digits is 102060, while the sum is 44.

The square root of 1975994 is about 1405.7005370989. The cubic root of 1975994 is about 125.4859801379.

The spelling of 1975994 in words is "one million, nine hundred seventy-five thousand, nine hundred ninety-four".