1392066 has 40 divisors (see below), whose sum is σ = 3364284. Its totient is φ = 427680.

The previous prime is 1392007. The next prime is 1392089. The reversal of 1392066 is 6602931.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1390041 + 2025 = 1179^2 + 45^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1776 + ... + 2436.

2^1392066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1392066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1682142).

1392066 is an abundant number, since it is smaller than the sum of its proper divisors (1972218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1392066 is a wasteful number, since it uses less digits than its factorization.

1392066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688 (or 679 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 1392066 is about 1179.8584660882. The cubic root of 1392066 is about 111.6571680740.

Adding to 1392066 its reverse (6602931), we get a palindrome (7994997).

The spelling of 1392066 in words is "one million, three hundred ninety-two thousand, sixty-six".