1975966 has 4 divisors (see below), whose sum is σ = 2963952. Its totient is φ = 987982.

The previous prime is 1975957. The next prime is 1975991. The reversal of 1975966 is 6695791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6695791 = 1567 ⋅4273.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493990 + ... + 493993.

It is an arithmetic number, because the mean of its divisors is an integer number (740988).

2^1975966 is an apocalyptic number.

1975966 is a deficient number, since it is larger than the sum of its proper divisors (987986).

1975966 is an equidigital number, since it uses as much as digits as its factorization.

1975966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987985.

The product of its digits is 102060, while the sum is 43.

The square root of 1975966 is about 1405.6905776166. The cubic root of 1975966 is about 125.4853874195.

The spelling of 1975966 in words is "one million, nine hundred seventy-five thousand, nine hundred sixty-six".