1203961 has 4 divisors (see below), whose sum is σ = 1313424. Its totient is φ = 1094500.

The previous prime is 1203959. The next prime is 1203971. The reversal of 1203961 is 1693021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1693021 = 11 ⋅153911.

It is not a de Polignac number, because 1203961 - 2¹ = 1203959 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1203901) 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 3 ways as a sum of consecutive naturals, for example, 54715 + ... + 54736.

It is an arithmetic number, because the mean of its divisors is an integer number (328356).

2^1203961 is an apocalyptic number.

1203961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1203961 is a deficient number, since it is larger than the sum of its proper divisors (109463).

1203961 is a wasteful number, since it uses less digits than its factorization.

1203961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109462.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 1203961 is about 1097.2515664149. The cubic root of 1203961 is about 106.3826504679.

Adding to 1203961 its reverse (1693021), we get a palindrome (2896982).

It can be divided in two parts, 12039 and 61, that added together give a square (12100 = 110²).

The spelling of 1203961 in words is "one million, two hundred three thousand, nine hundred sixty-one".