123425100 has 144 divisors (see below), whose sum is σ = 420285600. Its totient is φ = 30965760.

The previous prime is 123425023. The next prime is 123425101. The reversal of 123425100 is 1524321.

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

It is not an unprimeable number, because it can be changed into a prime (123425101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44556 + ... + 47244.

It is an arithmetic number, because the mean of its divisors is an integer number (2918650).

Almost surely, 2^123425100 is an apocalyptic number.

123425100 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 123425100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210142800).

123425100 is an abundant number, since it is smaller than the sum of its proper divisors (296860500).

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

123425100 is a wasteful number, since it uses less digits than its factorization.

123425100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2729 (or 2716 counting only the distinct ones).

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

The square root of 123425100 is about 11109.6849640303. The cubic root of 123425100 is about 497.8912522017.

Adding to 123425100 its reverse (1524321), we get a palindrome (124949421).

The spelling of 123425100 in words is "one hundred twenty-three million, four hundred twenty-five thousand, one hundred".