132540021 has 6 divisors (see below), whose sum is σ = 191446710. Its totient is φ = 88360008.

The previous prime is 132540017. The next prime is 132540043. The reversal of 132540021 is 120045231.

It can be written as a sum of positive squares in only one way, i.e., 124211025 + 8328996 = 11145^2 + 2886^2 .

It is not a de Polignac number, because 132540021 - 2² = 132540017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 132539976 and 132540003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (132540071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7363326 + ... + 7363343.

It is an arithmetic number, because the mean of its divisors is an integer number (31907785).

Almost surely, 2^132540021 is an apocalyptic number.

It is an amenable number.

132540021 is a deficient number, since it is larger than the sum of its proper divisors (58906689).

132540021 is a wasteful number, since it uses less digits than its factorization.

132540021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14726675 (or 14726672 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 132540021 is about 11512.6027031250. The cubic root of 132540021 is about 509.8577342514.

Adding to 132540021 its reverse (120045231), we get a palindrome (252585252).

The spelling of 132540021 in words is "one hundred thirty-two million, five hundred forty thousand, twenty-one".