1113420243 has 32 divisors (see below), whose sum is σ = 1646229312. Its totient is φ = 664934400.

The previous prime is 1113420227. The next prime is 1113420247. The reversal of 1113420243 is 3420243111.

It is not a de Polignac number, because 1113420243 - 2⁴ = 1113420227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1113420247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 751063 + ... + 752543.

It is an arithmetic number, because the mean of its divisors is an integer number (51444666).

Almost surely, 2^1113420243 is an apocalyptic number.

1113420243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1113420243 is a deficient number, since it is larger than the sum of its proper divisors (532809069).

1113420243 is a wasteful number, since it uses less digits than its factorization.

1113420243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2055.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1113420243 is about 33367.9523345380. The cubic root of 1113420243 is about 1036.4611731496.

Adding to 1113420243 its reverse (3420243111), we get a palindrome (4533663354).

It can be divided in two parts, 111 and 3420243, that multiplied together give a palindrome (379646973).

The spelling of 1113420243 in words is "one billion, one hundred thirteen million, four hundred twenty thousand, two hundred forty-three".