6561142 has 8 divisors (see below), whose sum is σ = 11247696. Its totient is φ = 2811912.

The previous prime is 6561127. The next prime is 6561143. The reversal of 6561142 is 2411656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6561143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234313 + ... + 234340.

It is an arithmetic number, because the mean of its divisors is an integer number (1405962).

Almost surely, 2^6561142 is an apocalyptic number.

6561142 is a deficient number, since it is larger than the sum of its proper divisors (4686554).

6561142 is a wasteful number, since it uses less digits than its factorization.

6561142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468662.

The product of its digits is 1440, while the sum is 25.

The square root of 6561142 is about 2561.4726233165. The cubic root of 6561142 is about 187.2088946452.

Adding to 6561142 its reverse (2411656), we get a palindrome (8972798).

The spelling of 6561142 in words is "six million, five hundred sixty-one thousand, one hundred forty-two".