541032721 has 4 divisors (see below), whose sum is σ = 541527012. Its totient is φ = 540538432.

The previous prime is 541032649. The next prime is 541032731. The reversal of 541032721 is 127230145.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 97298496 + 443734225 = 9864^2 + 21065^2 .

It is a cyclic number.

It is not a de Polignac number, because 541032721 - 2⁷ = 541032593 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (541032731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245500 + ... + 247693.

It is an arithmetic number, because the mean of its divisors is an integer number (135381753).

Almost surely, 2^541032721 is an apocalyptic number.

It is an amenable number.

541032721 is a deficient number, since it is larger than the sum of its proper divisors (494291).

541032721 is a wasteful number, since it uses less digits than its factorization.

541032721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494290.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 541032721 is about 23260.1100814248. The cubic root of 541032721 is about 814.8440721931.

Adding to 541032721 its reverse (127230145), we get a palindrome (668262866).

The spelling of 541032721 in words is "five hundred forty-one million, thirty-two thousand, seven hundred twenty-one".