123130155 has 32 divisors (see below), whose sum is σ = 206862336. Its totient is φ = 62420864.

The previous prime is 123130153. The next prime is 123130157. The reversal of 123130155 is 551031321.

It is an interprime number because it is at equal distance from previous prime (123130153) and next prime (123130157).

It is a cyclic number.

It is not a de Polignac number, because 123130155 - 2¹ = 123130153 is a prime.

It is a super-2 number, since 2×123130155² = 30322070140648050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123130153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58654 + ... + 60716.

It is an arithmetic number, because the mean of its divisors is an integer number (6464448).

Almost surely, 2^123130155 is an apocalyptic number.

123130155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123130155 is a deficient number, since it is larger than the sum of its proper divisors (83732181).

123130155 is a wasteful number, since it uses less digits than its factorization.

123130155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2267.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 123130155 is about 11096.4027955009. The cubic root of 123130155 is about 497.4943376206.

Adding to 123130155 its reverse (551031321), we get a palindrome (674161476).

The spelling of 123130155 in words is "one hundred twenty-three million, one hundred thirty thousand, one hundred fifty-five".