1231103 has 8 divisors (see below), whose sum is σ = 1284096. Its totient is φ = 1179000.

The previous prime is 1231099. The next prime is 1231127. The reversal of 1231103 is 3011321.

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 1231103 - 2² = 1231099 is a prime.

It is a super-2 number, since 2×1231103² = 3031229193218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231193) 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 7 ways as a sum of consecutive naturals, for example, 4550 + ... + 4812.

It is an arithmetic number, because the mean of its divisors is an integer number (160512).

2^1231103 is an apocalyptic number.

1231103 is a deficient number, since it is larger than the sum of its proper divisors (52993).

1231103 is a wasteful number, since it uses less digits than its factorization.

1231103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 1231103 is about 1109.5508100128. The cubic root of 1231103 is about 107.1761444931.

Adding to 1231103 its reverse (3011321), we get a palindrome (4242424).

The spelling of 1231103 in words is "one million, two hundred thirty-one thousand, one hundred three".