123420510 has 80 divisors (see below), whose sum is σ = 351424656. Its totient is φ = 30972672.

The previous prime is 123420509. The next prime is 123420529. The reversal of 123420510 is 15024321.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9289 + ... + 18251.

Almost surely, 2^123420510 is an apocalyptic number.

123420510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 123420510, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175712328).

123420510 is an abundant number, since it is smaller than the sum of its proper divisors (228004146).

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

123420510 is a wasteful number, since it uses less digits than its factorization.

123420510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8999 (or 8990 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 123420510 is about 11109.4783855949. The cubic root of 123420510 is about 497.8850801747.

Adding to 123420510 its reverse (15024321), we get a palindrome (138444831).

The spelling of 123420510 in words is "one hundred twenty-three million, four hundred twenty thousand, five hundred ten".