1234311345 has 128 divisors (see below), whose sum is σ = 2446540800. Its totient is φ = 589498560.

The previous prime is 1234311341. The next prime is 1234311347. The reversal of 1234311345 is 5431134321.

It is a happy number.

1234311345 is a `hidden beast` number, since 1 + 2 + 3 + 4 + 311 + 345 = 666.

It is not a de Polignac number, because 1234311345 - 2² = 1234311341 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1234311341) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 28704894 + ... + 28704936.

It is an arithmetic number, because the mean of its divisors is an integer number (19113600).

Almost surely, 2^1234311345 is an apocalyptic number.

1234311345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1234311345 is a deficient number, since it is larger than the sum of its proper divisors (1212229455).

1234311345 is an equidigital number, since it uses as much as digits as its factorization.

1234311345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 101 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 1234311345 is about 35132.7673974027. The cubic root of 1234311345 is about 1072.6916670507.

Adding to 1234311345 its reverse (5431134321), we get a palindrome (6665445666).

The spelling of 1234311345 in words is "one billion, two hundred thirty-four million, three hundred eleven thousand, three hundred forty-five".