12402520 has 128 divisors (see below), whose sum is σ = 33747840. Its totient is φ = 4055040.

The previous prime is 12402499. The next prime is 12402527. The reversal of 12402520 is 2520421.

It is a junction number, because it is equal to n+sod(n) for n = 12402494 and 12402503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12402527) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 203290 + ... + 203350.

It is an arithmetic number, because the mean of its divisors is an integer number (263655).

Almost surely, 2^12402520 is an apocalyptic number.

12402520 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 12402520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16873920).

12402520 is an abundant number, since it is smaller than the sum of its proper divisors (21345320).

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

12402520 is a wasteful number, since it uses less digits than its factorization.

12402520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 12402520 is about 3521.7211701099. The cubic root of 12402520 is about 231.4745838648.

Adding to 12402520 its reverse (2520421), we get a palindrome (14922941).

The spelling of 12402520 in words is "twelve million, four hundred two thousand, five hundred twenty".