1121403 has 8 divisors (see below), whose sum is σ = 1510416. Its totient is φ = 740000.

The previous prime is 1121389. The next prime is 1121423. The reversal of 1121403 is 3041211.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1121403 - 2⁴ = 1121387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1121423) 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 7 ways as a sum of consecutive naturals, for example, 1548 + ... + 2153.

It is an arithmetic number, because the mean of its divisors is an integer number (188802).

2^1121403 is an apocalyptic number.

1121403 is a deficient number, since it is larger than the sum of its proper divisors (389013).

1121403 is a wasteful number, since it uses less digits than its factorization.

1121403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3805.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1121403 is about 1058.9631721642. The cubic root of 1121403 is about 103.8932274501.

Adding to 1121403 its reverse (3041211), we get a palindrome (4162614).

The spelling of 1121403 in words is "one million, one hundred twenty-one thousand, four hundred three".