1021008573 has 12 divisors (see below), whose sum is σ = 1588235740. Its totient is φ = 628312896.

The previous prime is 1021008503. The next prime is 1021008581. The reversal of 1021008573 is 3758001201.

It can be written as a sum of positive squares in 2 ways, for example, as 427745124 + 593263449 = 20682^2 + 24357^2 .

It is not a de Polignac number, because 1021008573 - 2¹⁰ = 1021007549 is a prime.

It is a super-2 number, since 2×1021008573² = 2084917012278992658, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021008503) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4363168 + ... + 4363401.

Almost surely, 2^1021008573 is an apocalyptic number.

1021008573 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1021008573 is a deficient number, since it is larger than the sum of its proper divisors (567227167).

1021008573 is a wasteful number, since it uses less digits than its factorization.

1021008573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8726588 (or 8726585 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 1021008573 is about 31953.2247668369. The cubic root of 1021008573 is about 1006.9543821234.

Adding to 1021008573 its reverse (3758001201), we get a palindrome (4779009774).

The spelling of 1021008573 in words is "one billion, twenty-one million, eight thousand, five hundred seventy-three".