123106620 has 144 divisors (see below), whose sum is σ = 431954208. Its totient is φ = 25966080.

The previous prime is 123106591. The next prime is 123106637. The reversal of 123106620 is 26601321.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 36610 + ... + 39830.

It is an arithmetic number, because the mean of its divisors is an integer number (2999682).

Almost surely, 2^123106620 is an apocalyptic number.

123106620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123106620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215977104).

123106620 is an abundant number, since it is smaller than the sum of its proper divisors (308847588).

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

123106620 is a wasteful number, since it uses less digits than its factorization.

123106620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3260 (or 3251 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 123106620 is about 11095.3422660141. The cubic root of 123106620 is about 497.4626387101.

Adding to 123106620 its reverse (26601321), we get a palindrome (149707941).

The spelling of 123106620 in words is "one hundred twenty-three million, one hundred six thousand, six hundred twenty".