1393642 has 12 divisors (see below), whose sum is σ = 2152710. Its totient is φ = 676656.

The previous prime is 1393633. The next prime is 1393649. The reversal of 1393642 is 2463931.

It can be written as a sum of positive squares in 3 ways, for example, as 1320201 + 73441 = 1149^2 + 271^2 .

It is a zygodrome in base 4.

It is a self number, because there is not a number n which added to its sum of digits gives 1393642.

It is not an unprimeable number, because it can be changed into a prime (1393649) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 2484 + ... + 2992.

2^1393642 is an apocalyptic number.

1393642 is a deficient number, since it is larger than the sum of its proper divisors (759068).

1393642 is an equidigital number, since it uses as much as digits as its factorization.

1393642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585 (or 548 counting only the distinct ones).

The product of its digits is 3888, while the sum is 28.

The square root of 1393642 is about 1180.5261538822. The cubic root of 1393642 is about 111.6992890010.

The spelling of 1393642 in words is "one million, three hundred ninety-three thousand, six hundred forty-two".