524961721 has 4 divisors (see below), whose sum is σ = 527862244. Its totient is φ = 522061200.

The previous prime is 524961709. The next prime is 524961733. The reversal of 524961721 is 127169425.

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

It is an interprime number because it is at equal distance from previous prime (524961709) and next prime (524961733).

It can be written as a sum of positive squares in 2 ways, for example, as 72931600 + 452030121 = 8540^2 + 21261^2 .

It is a cyclic number.

It is not a de Polignac number, because 524961721 - 2¹³ = 524953529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (524964721) 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 3 ways as a sum of consecutive naturals, for example, 1449990 + ... + 1450351.

It is an arithmetic number, because the mean of its divisors is an integer number (131965561).

Almost surely, 2^524961721 is an apocalyptic number.

It is an amenable number.

524961721 is a deficient number, since it is larger than the sum of its proper divisors (2900523).

524961721 is a wasteful number, since it uses less digits than its factorization.

524961721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2900522.

The product of its digits is 30240, while the sum is 37.

The square root of 524961721 is about 22912.0431432904. The cubic root of 524961721 is about 806.6947160484.

The spelling of 524961721 in words is "five hundred twenty-four million, nine hundred sixty-one thousand, seven hundred twenty-one".