572021489 has 4 divisors (see below), whose sum is σ = 616023156. Its totient is φ = 528019824.

The previous prime is 572021459. The next prime is 572021497. The reversal of 572021489 is 984120275.

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 96040000 + 475981489 = 9800^2 + 21817^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-572021489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (572021449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22000814 + ... + 22000839.

It is an arithmetic number, because the mean of its divisors is an integer number (154005789).

Almost surely, 2^572021489 is an apocalyptic number.

It is an amenable number.

572021489 is a deficient number, since it is larger than the sum of its proper divisors (44001667).

572021489 is a wasteful number, since it uses less digits than its factorization.

572021489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44001666.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 572021489 is about 23916.9707320973. The cubic root of 572021489 is about 830.1134450829.

The spelling of 572021489 in words is "five hundred seventy-two million, twenty-one thousand, four hundred eighty-nine".