123145056 has 48 divisors (see below), whose sum is σ = 359175600. Its totient is φ = 41048064.

The previous prime is 123145037. The next prime is 123145067. The reversal of 123145056 is 650541321.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70401 + ... + 72128.

It is an arithmetic number, because the mean of its divisors is an integer number (7482825).

Almost surely, 2^123145056 is an apocalyptic number.

123145056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

123145056 is an abundant number, since it is smaller than the sum of its proper divisors (236030544).

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

123145056 is a wasteful number, since it uses less digits than its factorization.

123145056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142548 (or 142534 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 123145056 is about 11097.0742089976. The cubic root of 123145056 is about 497.5144054480.

Adding to 123145056 its reverse (650541321), we get a palindrome (773686377).

The spelling of 123145056 in words is "one hundred twenty-three million, one hundred forty-five thousand, fifty-six".