123019530 has 16 divisors (see below), whose sum is σ = 295246944. Its totient is φ = 32805200.

The previous prime is 123019513. The next prime is 123019553. The reversal of 123019530 is 35910321.

It is a happy number.

It is a super-2 number, since 2×123019530² = 30267609522841800, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 123019530.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2050296 + ... + 2050355.

It is an arithmetic number, because the mean of its divisors is an integer number (18452934).

Almost surely, 2^123019530 is an apocalyptic number.

123019530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123019530 is an abundant number, since it is smaller than the sum of its proper divisors (172227414).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123019530 is a wasteful number, since it uses less digits than its factorization.

123019530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4100661.

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 123019530 is about 11091.4169518597. The cubic root of 123019530 is about 497.3453034508.

Adding to 123019530 its reverse (35910321), we get a palindrome (158929851).

The spelling of 123019530 in words is "one hundred twenty-three million, nineteen thousand, five hundred thirty".