3966129 has 6 divisors (see below), whose sum is σ = 5728866. Its totient is φ = 2644080.

The previous prime is 3966121. The next prime is 3966139. The reversal of 3966129 is 9216693.

3966129 is a `hidden beast` number, since 39 + 6 + 612 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3908529 + 57600 = 1977^2 + 240^2 .

It is not a de Polignac number, because 3966129 - 2³ = 3966121 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3966093 and 3966102.

It is not an unprimeable number, because it can be changed into a prime (3966121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 220332 + ... + 220349.

It is an arithmetic number, because the mean of its divisors is an integer number (954811).

Almost surely, 2^3966129 is an apocalyptic number.

It is an amenable number.

3966129 is a deficient number, since it is larger than the sum of its proper divisors (1762737).

3966129 is a wasteful number, since it uses less digits than its factorization.

3966129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440687 (or 440684 counting only the distinct ones).

The product of its digits is 17496, while the sum is 36.

The square root of 3966129 is about 1991.5142480033. The cubic root of 3966129 is about 158.2907773596.

It can be divided in two parts, 3966 and 129, that added together give a triangular number (4095 = T₉₀).

The spelling of 3966129 in words is "three million, nine hundred sixty-six thousand, one hundred twenty-nine".