6135561 has 16 divisors (see below), whose sum is σ = 9174720. Its totient is φ = 4052160.

The previous prime is 6135553. The next prime is 6135581. The reversal of 6135561 is 1655316.

It is a happy number.

It is not a de Polignac number, because 6135561 - 2³ = 6135553 is a prime.

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

It is a Curzon number.

6135561 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6135581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2046 + ... + 4056.

It is an arithmetic number, because the mean of its divisors is an integer number (573420).

Almost surely, 2^6135561 is an apocalyptic number.

It is an amenable number.

6135561 is a deficient number, since it is larger than the sum of its proper divisors (3039159).

6135561 is a wasteful number, since it uses less digits than its factorization.

6135561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2133 (or 2127 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 6135561 is about 2477.0064594183. The cubic root of 6135561 is about 183.0703841057.

It can be divided in two parts, 61355 and 61, that added together give a palindrome (61416).

The spelling of 6135561 in words is "six million, one hundred thirty-five thousand, five hundred sixty-one".