123233145 has 64 divisors (see below), whose sum is σ = 239124480. Its totient is φ = 52939008.

The previous prime is 123233129. The next prime is 123233147. The reversal of 123233145 is 541332321.

It is not a de Polignac number, because 123233145 - 2⁴ = 123233129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123233147) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 444747 + ... + 445023.

It is an arithmetic number, because the mean of its divisors is an integer number (3736320).

Almost surely, 2^123233145 is an apocalyptic number.

123233145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123233145 is a deficient number, since it is larger than the sum of its proper divisors (115891335).

123233145 is a wasteful number, since it uses less digits than its factorization.

123233145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534.

The product of its digits is 2160, while the sum is 24.

The square root of 123233145 is about 11101.0425186106. The cubic root of 123233145 is about 497.6330056912.

Adding to 123233145 its reverse (541332321), we get a palindrome (664565466).

The spelling of 123233145 in words is "one hundred twenty-three million, two hundred thirty-three thousand, one hundred forty-five".