123345145 has 16 divisors (see below), whose sum is σ = 184537728. Its totient is φ = 76890240.

The previous prime is 123345143. The next prime is 123345259. The reversal of 123345145 is 541543321.

123345145 = 363² + 364² + ... + 747².

It is not a de Polignac number, because 123345145 - 2¹ = 123345143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123345143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159804 + ... + 160573.

It is an arithmetic number, because the mean of its divisors is an integer number (11533608).

Almost surely, 2^123345145 is an apocalyptic number.

It is an amenable number.

123345145 is a deficient number, since it is larger than the sum of its proper divisors (61192583).

123345145 is a wasteful number, since it uses less digits than its factorization.

123345145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320400.

The product of its digits is 7200, while the sum is 28.

The square root of 123345145 is about 11106.0859442019. The cubic root of 123345145 is about 497.7837173641.

Adding to 123345145 its reverse (541543321), we get a palindrome (664888466).

The spelling of 123345145 in words is "one hundred twenty-three million, three hundred forty-five thousand, one hundred forty-five".