6540232 has 8 divisors (see below), whose sum is σ = 12262950. Its totient is φ = 3270112.

The previous prime is 6540217. The next prime is 6540239. The reversal of 6540232 is 2320456.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 4813636 + 1726596 = 2194^2 + 1314^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×6540232² = 85549269227648, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6540239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408757 + ... + 408772.

Almost surely, 2^6540232 is an apocalyptic number.

It is an amenable number.

6540232 is a deficient number, since it is larger than the sum of its proper divisors (5722718).

6540232 is a wasteful number, since it uses less digits than its factorization.

6540232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817535 (or 817531 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 6540232 is about 2557.3877296961. The cubic root of 6540232 is about 187.0098081732.

Adding to 6540232 its reverse (2320456), we get a palindrome (8860688).

The spelling of 6540232 in words is "six million, five hundred forty thousand, two hundred thirty-two".