123253020 has 108 divisors (see below), whose sum is σ = 411017880. Its totient is φ = 29874240.

The previous prime is 123253003. The next prime is 123253033. The reversal of 123253020 is 20352321.

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

It is a junction number, because it is equal to n+sod(n) for n = 123252984 and 123253002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 18951 + ... + 24609.

Almost surely, 2^123253020 is an apocalyptic number.

123253020 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 123253020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205508940).

123253020 is an abundant number, since it is smaller than the sum of its proper divisors (287764860).

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

123253020 is a wasteful number, since it uses less digits than its factorization.

123253020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5696 (or 5680 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 123253020 is about 11101.9376687135. The cubic root of 123253020 is about 497.6597569474.

The spelling of 123253020 in words is "one hundred twenty-three million, two hundred fifty-three thousand, twenty".