123511345 has 8 divisors (see below), whose sum is σ = 148426920. Its totient is φ = 98666880.

The previous prime is 123511331. The next prime is 123511417. The reversal of 123511345 is 543115321.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 833569 + 122677776 = 913^2 + 11076^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123511345 - 2¹¹ = 123509297 is a prime.

It is an unprimeable number.

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, 13876 + ... + 20965.

It is an arithmetic number, because the mean of its divisors is an integer number (18553365).

Almost surely, 2^123511345 is an apocalyptic number.

It is an amenable number.

123511345 is a deficient number, since it is larger than the sum of its proper divisors (24915575).

123511345 is an equidigital number, since it uses as much as digits as its factorization.

123511345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35555.

The product of its digits is 1800, while the sum is 25.

The square root of 123511345 is about 11113.5658094061. The cubic root of 123511345 is about 498.0071946725.

Adding to 123511345 its reverse (543115321), we get a palindrome (666626666).

The spelling of 123511345 in words is "one hundred twenty-three million, five hundred eleven thousand, three hundred forty-five".