13251420 has 144 divisors (see below), whose sum is σ = 49533120. Its totient is φ = 2792448.

The previous prime is 13251419. The next prime is 13251421. The reversal of 13251420 is 2415231.

13251420 is a `hidden beast` number, since 132 + 514 + 20 = 666.

13251420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13251419) and next prime (13251421).

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 = 13251393 and 13251402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13251421) 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, 15976 + ... + 16784.

It is an arithmetic number, because the mean of its divisors is an integer number (343980).

Almost surely, 2^13251420 is an apocalyptic number.

13251420 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 13251420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24766560).

13251420 is an abundant number, since it is smaller than the sum of its proper divisors (36281700).

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

13251420 is a wasteful number, since it uses less digits than its factorization.

13251420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844 (or 839 counting only the distinct ones).

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

The square root of 13251420 is about 3640.2499914154. The cubic root of 13251420 is about 236.6396274957.

Adding to 13251420 its reverse (2415231), we get a palindrome (15666651).

The spelling of 13251420 in words is "thirteen million, two hundred fifty-one thousand, four hundred twenty".