1145231113 has 4 divisors (see below), whose sum is σ = 1233325828. Its totient is φ = 1057136400.

The previous prime is 1145231107. The next prime is 1145231119. The reversal of 1145231113 is 3111325411.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (1145231107) and next prime (1145231119).

It can be written as a sum of positive squares in 2 ways, for example, as 586995984 + 558235129 = 24228^2 + 23627^2 .

It is a cyclic number.

It is not a de Polignac number, because 1145231113 - 2⁹ = 1145230601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145231119) 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, 44047338 + ... + 44047363.

It is an arithmetic number, because the mean of its divisors is an integer number (308331457).

Almost surely, 2^1145231113 is an apocalyptic number.

1145231113 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1145231113 is a deficient number, since it is larger than the sum of its proper divisors (88094715).

1145231113 is an equidigital number, since it uses as much as digits as its factorization.

1145231113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88094714.

The product of its digits is 360, while the sum is 22.

The square root of 1145231113 is about 33841.2634663660. The cubic root of 1145231113 is about 1046.2393400182.

Adding to 1145231113 its reverse (3111325411), we get a palindrome (4256556524).

The spelling of 1145231113 in words is "one billion, one hundred forty-five million, two hundred thirty-one thousand, one hundred thirteen".