123010155 has 12 divisors (see below), whose sum is σ = 213217680. Its totient is φ = 65605392.

The previous prime is 123010109. The next prime is 123010157. The reversal of 123010155 is 551010321.

It is not a de Polignac number, because 123010155 - 2⁸ = 123009899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123010157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1366735 + ... + 1366824.

It is an arithmetic number, because the mean of its divisors is an integer number (17768140).

Almost surely, 2^123010155 is an apocalyptic number.

123010155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123010155 is a deficient number, since it is larger than the sum of its proper divisors (90207525).

123010155 is a wasteful number, since it uses less digits than its factorization.

123010155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2733570 (or 2733567 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 123010155 is about 11090.9943197172. The cubic root of 123010155 is about 497.3326693304.

Adding to 123010155 its reverse (551010321), we get a palindrome (674020476).

The spelling of 123010155 in words is "one hundred twenty-three million, ten thousand, one hundred fifty-five".