6432561 has 32 divisors (see below), whose sum is σ = 10068480. Its totient is φ = 4053888.

The previous prime is 6432551. The next prime is 6432563. The reversal of 6432561 is 1652346.

It is not a de Polignac number, because 6432561 - 2¹⁴ = 6416177 is a prime.

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

It is a Curzon number.

6432561 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6432563) 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, 46885 + ... + 47021.

It is an arithmetic number, because the mean of its divisors is an integer number (314640).

Almost surely, 2^6432561 is an apocalyptic number.

It is an amenable number.

6432561 is a deficient number, since it is larger than the sum of its proper divisors (3635919).

6432561 is a wasteful number, since it uses less digits than its factorization.

6432561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230 (or 224 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 6432561 is about 2536.2493962542. The cubic root of 6432561 is about 185.9778849877.

The spelling of 6432561 in words is "six million, four hundred thirty-two thousand, five hundred sixty-one".