1145231103 has 4 divisors (see below), whose sum is σ = 1526974808. Its totient is φ = 763487400.

The previous prime is 1145231077. The next prime is 1145231107. The reversal of 1145231103 is 3011325411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3011325411 = 3 ⋅1003775137.

It is not a de Polignac number, because 1145231103 - 2⁶ = 1145231039 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1145231103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145231107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190871848 + ... + 190871853.

It is an arithmetic number, because the mean of its divisors is an integer number (381743702).

Almost surely, 2^1145231103 is an apocalyptic number.

1145231103 is a deficient number, since it is larger than the sum of its proper divisors (381743705).

1145231103 is an equidigital number, since it uses as much as digits as its factorization.

1145231103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381743704.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1145231103 is about 33841.2633186174. The cubic root of 1145231103 is about 1046.2393369730.

Adding to 1145231103 its reverse (3011325411), we get a palindrome (4156556514).

The spelling of 1145231103 in words is "one billion, one hundred forty-five million, two hundred thirty-one thousand, one hundred three".