1103421643 has 8 divisors (see below), whose sum is σ = 1131071760. Its totient is φ = 1075806720.

The previous prime is 1103421607. The next prime is 1103421689. The reversal of 1103421643 is 3461243011.

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 1103421643 - 2²¹ = 1101324491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1103422643) 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, 61648 + ... + 77506.

It is an arithmetic number, because the mean of its divisors is an integer number (141383970).

Almost surely, 2^1103421643 is an apocalyptic number.

1103421643 is a deficient number, since it is larger than the sum of its proper divisors (27650117).

1103421643 is a wasteful number, since it uses less digits than its factorization.

1103421643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17597.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1103421643 is about 33217.7910614177. The cubic root of 1103421643 is about 1033.3493391092.

Adding to 1103421643 its reverse (3461243011), we get a palindrome (4564664654).

The spelling of 1103421643 in words is "one billion, one hundred three million, four hundred twenty-one thousand, six hundred forty-three".