123161230 has 16 divisors (see below), whose sum is σ = 233358480. Its totient is φ = 46671552.

The previous prime is 123161189. The next prime is 123161239. The reversal of 123161230 is 32161321.

It is a super-2 number, since 2×123161230² = 30337377150225800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 123161198 and 123161207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123161239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323919 + ... + 324298.

It is an arithmetic number, because the mean of its divisors is an integer number (14584905).

Almost surely, 2^123161230 is an apocalyptic number.

123161230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123161230 is a deficient number, since it is larger than the sum of its proper divisors (110197250).

123161230 is a wasteful number, since it uses less digits than its factorization.

123161230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648243.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 123161230 is about 11097.8029357166. The cubic root of 123161230 is about 497.5361858480.

Subtracting from 123161230 its reverse (32161321), we obtain a palindrome (90999909).

The spelling of 123161230 in words is "one hundred twenty-three million, one hundred sixty-one thousand, two hundred thirty".