123149502 has 48 divisors (see below), whose sum is σ = 307992672. Its totient is φ = 34833600.

The previous prime is 123149501. The next prime is 123149503. The reversal of 123149502 is 205941321.

123149502 is a `hidden beast` number, since 12 + 3 + 149 + 502 = 666.

It is an interprime number because it is at equal distance from previous prime (123149501) and next prime (123149503).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123149501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7888 + ... + 17564.

It is an arithmetic number, because the mean of its divisors is an integer number (6416514).

Almost surely, 2^123149502 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123149502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153996336).

123149502 is an abundant number, since it is smaller than the sum of its proper divisors (184843170).

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

123149502 is a wasteful number, since it uses less digits than its factorization.

123149502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9793 (or 9790 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 123149502 is about 11097.2745302619. The cubic root of 123149502 is about 497.5203927568.

The spelling of 123149502 in words is "one hundred twenty-three million, one hundred forty-nine thousand, five hundred two".