1966445 has 8 divisors (see below), whose sum is σ = 2541336. Its totient is φ = 1452096.

The previous prime is 1966429. The next prime is 1966463. The reversal of 1966445 is 5446691.

It can be written as a sum of positive squares in 4 ways, for example, as 320356 + 1646089 = 566^2 + 1283^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1966445 - 2⁴ = 1966429 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15062 + ... + 15191.

It is an arithmetic number, because the mean of its divisors is an integer number (317667).

2^1966445 is an apocalyptic number.

It is an amenable number.

1966445 is a deficient number, since it is larger than the sum of its proper divisors (574891).

1966445 is a wasteful number, since it uses less digits than its factorization.

1966445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30271.

The product of its digits is 25920, while the sum is 35.

The square root of 1966445 is about 1402.2998965984. The cubic root of 1966445 is about 125.2835164612.

The spelling of 1966445 in words is "one million, nine hundred sixty-six thousand, four hundred forty-five".