13451620 has 96 divisors (see below), whose sum is σ = 36691200. Its totient is φ = 4022784.

The previous prime is 13451617. The next prime is 13451629. The reversal of 13451620 is 2615431.

It is a junction number, because it is equal to n+sod(n) for n = 13451591 and 13451600.

It is not an unprimeable number, because it can be changed into a prime (13451629) 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, 34386 + ... + 34774.

It is an arithmetic number, because the mean of its divisors is an integer number (382200).

Almost surely, 2^13451620 is an apocalyptic number.

13451620 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 13451620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18345600).

13451620 is an abundant number, since it is smaller than the sum of its proper divisors (23239580).

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

13451620 is a wasteful number, since it uses less digits than its factorization.

13451620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437 (or 435 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 13451620 is about 3667.6450209910. The cubic root of 13451620 is about 237.8253785843.

The spelling of 13451620 in words is "thirteen million, four hundred fifty-one thousand, six hundred twenty".