1966995 has 12 divisors (see below), whose sum is σ = 3409536. Its totient is φ = 1049040.

The previous prime is 1966973. The next prime is 1966999. The reversal of 1966995 is 5996691.

It is not a de Polignac number, because 1966995 - 2⁵ = 1966963 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 43711 = 1966995 / (1 + 9 + 6 + 6 + 9 + 9 + 5).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1966995.

It is not an unprimeable number, because it can be changed into a prime (1966999) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21811 + ... + 21900.

It is an arithmetic number, because the mean of its divisors is an integer number (284128).

2^1966995 is an apocalyptic number.

1966995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1966995 is a deficient number, since it is larger than the sum of its proper divisors (1442541).

1966995 is a wasteful number, since it uses less digits than its factorization.

1966995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43722 (or 43719 counting only the distinct ones).

The product of its digits is 131220, while the sum is 45.

The square root of 1966995 is about 1402.4959892991. The cubic root of 1966995 is about 125.2951956607.

The spelling of 1966995 in words is "one million, nine hundred sixty-six thousand, nine hundred ninety-five".