1103240921 has 4 divisors (see below), whose sum is σ = 1104098100. Its totient is φ = 1102383744.

The previous prime is 1103240899. The next prime is 1103240923. The reversal of 1103240921 is 1290423011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 908359321 + 194881600 = 30139^2 + 13960^2 .

It is a cyclic number.

It is not a de Polignac number, because 1103240921 - 2²⁶ = 1036132057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1103240923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 426656 + ... + 429233.

It is an arithmetic number, because the mean of its divisors is an integer number (276024525).

Almost surely, 2^1103240921 is an apocalyptic number.

It is an amenable number.

1103240921 is a deficient number, since it is larger than the sum of its proper divisors (857179).

1103240921 is an equidigital number, since it uses as much as digits as its factorization.

1103240921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857178.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1103240921 is about 33215.0706908777. The cubic root of 1103240921 is about 1033.2929209193.

Adding to 1103240921 its reverse (1290423011), we get a palindrome (2393663932).

The spelling of 1103240921 in words is "one billion, one hundred three million, two hundred forty thousand, nine hundred twenty-one".