123311045 has 64 divisors (see below), whose sum is σ = 189907200. Its totient is φ = 75479040.

The previous prime is 123311011. The next prime is 123311051. The reversal of 123311045 is 540113321.

It is not a de Polignac number, because 123311045 - 2¹⁰ = 123310021 is a prime.

It is a super-2 number, since 2×123311045² = 30411227637984050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 393809 + ... + 394121.

It is an arithmetic number, because the mean of its divisors is an integer number (2967300).

Almost surely, 2^123311045 is an apocalyptic number.

It is an amenable number.

123311045 is a deficient number, since it is larger than the sum of its proper divisors (66596155).

123311045 is a wasteful number, since it uses less digits than its factorization.

123311045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 123311045 is about 11104.5506437676. The cubic root of 123311045 is about 497.7378407057.

Adding to 123311045 its reverse (540113321), we get a palindrome (663424366).

The spelling of 123311045 in words is "one hundred twenty-three million, three hundred eleven thousand, forty-five".