13425561 has 32 divisors (see below), whose sum is σ = 20793600. Its totient is φ = 8553600.

The previous prime is 13425547. The next prime is 13425569. The reversal of 13425561 is 16552431.

It is not a de Polignac number, because 13425561 - 2¹⁴ = 13409177 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (13425569) 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, 88836 + ... + 88986.

It is an arithmetic number, because the mean of its divisors is an integer number (649800).

Almost surely, 2^13425561 is an apocalyptic number.

It is an amenable number.

13425561 is a deficient number, since it is larger than the sum of its proper divisors (7368039).

13425561 is a wasteful number, since it uses less digits than its factorization.

13425561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286 (or 280 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 13425561 is about 3664.0907466928. The cubic root of 13425561 is about 237.6717044578.

Adding to 13425561 its reverse (16552431), we get a palindrome (29977992).

It can be divided in two parts, 1342 and 5561, that added together give a triangular number (6903 = T₁₁₇).

The spelling of 13425561 in words is "thirteen million, four hundred twenty-five thousand, five hundred sixty-one".