1103156420 has 12 divisors (see below), whose sum is σ = 2316628524. Its totient is φ = 441262560.

The previous prime is 1103156419. The next prime is 1103156423. The reversal of 1103156420 is 246513011.

It can be written as a sum of positive squares in 2 ways, for example, as 664505284 + 438651136 = 25778^2 + 20944^2 .

It is not an unprimeable number, because it can be changed into a prime (1103156423) 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 3 ways as a sum of consecutive naturals, for example, 27578891 + ... + 27578930.

It is an arithmetic number, because the mean of its divisors is an integer number (193052377).

Almost surely, 2^1103156420 is an apocalyptic number.

1103156420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1103156420 is an abundant number, since it is smaller than the sum of its proper divisors (1213472104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1103156420 is a wasteful number, since it uses less digits than its factorization.

1103156420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55157830 (or 55157828 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1103156420 is about 33213.7986385177. The cubic root of 1103156420 is about 1033.2665390980.

Adding to 1103156420 its reverse (246513011), we get a palindrome (1349669431).

The spelling of 1103156420 in words is "one billion, one hundred three million, one hundred fifty-six thousand, four hundred twenty".