123740620 has 48 divisors (see below), whose sum is σ = 276187968. Its totient is φ = 46407680.

The previous prime is 123740611. The next prime is 123740629. The reversal of 123740620 is 26047321.

It is an interprime number because it is at equal distance from previous prime (123740611) and next prime (123740629).

It is not an unprimeable number, because it can be changed into a prime (123740629) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 119505 + ... + 120535.

It is an arithmetic number, because the mean of its divisors is an integer number (5753916).

Almost surely, 2^123740620 is an apocalyptic number.

123740620 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 123740620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138093984).

123740620 is an abundant number, since it is smaller than the sum of its proper divisors (152447348).

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

123740620 is a wasteful number, since it uses less digits than its factorization.

123740620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1410 (or 1408 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 123740620 is about 11123.8761230068. The cubic root of 123740620 is about 498.3151556427.

Adding to 123740620 its reverse (26047321), we get a palindrome (149787941).

The spelling of 123740620 in words is "one hundred twenty-three million, seven hundred forty thousand, six hundred twenty".