123155000 has 40 divisors (see below), whose sum is σ = 288563880. Its totient is φ = 49260000.

The previous prime is 123154963. The next prime is 123155009. The reversal of 123155000 is 551321.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 123155000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123155009) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 7316 + ... + 17315.

It is an arithmetic number, because the mean of its divisors is an integer number (7214097).

Almost surely, 2^123155000 is an apocalyptic number.

123155000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123155000 is an abundant number, since it is smaller than the sum of its proper divisors (165408880).

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

123155000 is an equidigital number, since it uses as much as digits as its factorization.

123155000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24657 (or 24638 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 123155000 is about 11097.5222459791. The cubic root of 123155000 is about 497.5277965665.

The spelling of 123155000 in words is "one hundred twenty-three million, one hundred fifty-five thousand".