1052288721 has 27 divisors (see below), whose sum is σ = 1672415017. Its totient is φ = 637101960.

The previous prime is 1052288719. The next prime is 1052288747. The reversal of 1052288721 is 1278822501.

The square root of 1052288721 is 32439.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1052288721 - 2¹ = 1052288719 is a prime.

It is a super-2 number, since 2×1052288721² = 2214623104687631682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1052288701) 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 26 ways as a sum of consecutive naturals, for example, 1069996 + ... + 1070978.

Almost surely, 2^1052288721 is an apocalyptic number.

1052288721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1052288721 is the 32439-th square number.

1052288721 is the 16220-th centered octagonal number.

It is an amenable number.

1052288721 is a deficient number, since it is larger than the sum of its proper divisors (620126296).

1052288721 is an frugal number, since it uses more digits than its factorization.

1052288721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1994 (or 997 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The cubic root of 1052288721 is about 1017.1343122210.

Multiplying 1052288721 by its sum of digits (36), we get a square (37882393956 = 194634²).

The spelling of 1052288721 in words is "one billion, fifty-two million, two hundred eighty-eight thousand, seven hundred twenty-one".