123520572 has 144 divisors (see below), whose sum is σ = 394722720. Its totient is φ = 33191424.

The previous prime is 123520531. The next prime is 123520583. The reversal of 123520572 is 275025321.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 89278 + ... + 90650.

It is an arithmetic number, because the mean of its divisors is an integer number (2741130).

Almost surely, 2^123520572 is an apocalyptic number.

123520572 is a gapful number since it is divisible by the number (12) 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 123520572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197361360).

123520572 is an abundant number, since it is smaller than the sum of its proper divisors (271202148).

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

123520572 is a wasteful number, since it uses less digits than its factorization.

123520572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1417 (or 1402 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 123520572 is about 11113.9809249431. The cubic root of 123520572 is about 498.0195956870.

Adding to 123520572 its reverse (275025321), we get a palindrome (398545893).

The spelling of 123520572 in words is "one hundred twenty-three million, five hundred twenty thousand, five hundred seventy-two".