1966149 has 6 divisors (see below), whose sum is σ = 2840006. Its totient is φ = 1310760.

The previous prime is 1966127. The next prime is 1966163. The reversal of 1966149 is 9416691.

It can be written as a sum of positive squares in only one way, i.e., 986049 + 980100 = 993^2 + 990^2 .

It is not a de Polignac number, because 1966149 - 2⁸ = 1965893 is a prime.

It is a Duffinian number.

1966149 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1966189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 109222 + ... + 109239.

2^1966149 is an apocalyptic number.

It is an amenable number.

1966149 is a deficient number, since it is larger than the sum of its proper divisors (873857).

1966149 is a wasteful number, since it uses less digits than its factorization.

1966149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218467 (or 218464 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 1966149 is about 1402.1943517216. The cubic root of 1966149 is about 125.2772300269.

The spelling of 1966149 in words is "one million, nine hundred sixty-six thousand, one hundred forty-nine".