1239963 has 16 divisors (see below), whose sum is σ = 1796256. Its totient is φ = 757760.

The previous prime is 1239961. The next prime is 1239971. The reversal of 1239963 is 3699321.

It is a cyclic number.

It is not a de Polignac number, because 1239963 - 2¹ = 1239961 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1239961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1795 + ... + 2387.

It is an arithmetic number, because the mean of its divisors is an integer number (112266).

2^1239963 is an apocalyptic number.

1239963 is a deficient number, since it is larger than the sum of its proper divisors (556293).

1239963 is a wasteful number, since it uses less digits than its factorization.

1239963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654.

The product of its digits is 8748, while the sum is 33.

The square root of 1239963 is about 1113.5362589516. The cubic root of 1239963 is about 107.4326385272.

It can be divided in two parts, 123 and 9963, that multiplied together give a square (1225449 = 1107²).

The spelling of 1239963 in words is "one million, two hundred thirty-nine thousand, nine hundred sixty-three".