13561420 has 24 divisors (see below), whose sum is σ = 28557648. Its totient is φ = 5409600.

The previous prime is 13561417. The next prime is 13561433. The reversal of 13561420 is 2416531.

It is a super-2 number, since 2×13561420² = 367824224832800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13561391 and 13561400.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9130 + ... + 10510.

It is an arithmetic number, because the mean of its divisors is an integer number (1189902).

Almost surely, 2^13561420 is an apocalyptic number.

13561420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13561420 is an abundant number, since it is smaller than the sum of its proper divisors (14996228).

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

13561420 is a wasteful number, since it uses less digits than its factorization.

13561420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1881 (or 1879 counting only the distinct ones).

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

The square root of 13561420 is about 3682.5833323905. The cubic root of 13561420 is about 238.4707158879.

Adding to 13561420 its reverse (2416531), we get a palindrome (15977951).

The spelling of 13561420 in words is "thirteen million, five hundred sixty-one thousand, four hundred twenty".