123522145 has 8 divisors (see below), whose sum is σ = 148559400. Its totient is φ = 98595840.

The previous prime is 123522137. The next prime is 123522149. The reversal of 123522145 is 541225321.

It can be written as a sum of positive squares in 4 ways, for example, as 8346321 + 115175824 = 2889^2 + 10732^2 .

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

It is not a de Polignac number, because 123522145 - 2³ = 123522137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123522149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25266 + ... + 29755.

It is an arithmetic number, because the mean of its divisors is an integer number (18569925).

Almost surely, 2^123522145 is an apocalyptic number.

It is an amenable number.

123522145 is a deficient number, since it is larger than the sum of its proper divisors (25037255).

123522145 is an equidigital number, since it uses as much as digits as its factorization.

123522145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55475.

The product of its digits is 2400, while the sum is 25.

The square root of 123522145 is about 11114.0516914400. The cubic root of 123522145 is about 498.0217097249.

Adding to 123522145 its reverse (541225321), we get a palindrome (664747466).

The spelling of 123522145 in words is "one hundred twenty-three million, five hundred twenty-two thousand, one hundred forty-five".