123511145 has 8 divisors (see below), whose sum is σ = 153324360. Its totient is φ = 95401600.

The previous prime is 123511097. The next prime is 123511163. The reversal of 123511145 is 541115321.

It can be written as a sum of positive squares in 4 ways, for example, as 29246464 + 94264681 = 5408^2 + 9709^2 .

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

It is not a de Polignac number, because 123511145 - 2²⁰ = 122462569 is a prime.

It is a super-2 number, since 2×123511145² = 30510005878422050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123511145.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 425756 + ... + 426045.

It is an arithmetic number, because the mean of its divisors is an integer number (19165545).

Almost surely, 2^123511145 is an apocalyptic number.

It is an amenable number.

123511145 is a deficient number, since it is larger than the sum of its proper divisors (29813215).

123511145 is an equidigital number, since it uses as much as digits as its factorization.

123511145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851835.

The product of its digits is 600, while the sum is 23.

The square root of 123511145 is about 11113.5568113903. The cubic root of 123511145 is about 498.0069258672.

Adding to 123511145 its reverse (541115321), we get a palindrome (664626466).

The spelling of 123511145 in words is "one hundred twenty-three million, five hundred eleven thousand, one hundred forty-five".