1021530053 has 4 divisors (see below), whose sum is σ = 1033837728. Its totient is φ = 1009222380.

The previous prime is 1021530049. The next prime is 1021530061. The reversal of 1021530053 is 3500351201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1021530053 - 2² = 1021530049 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021530023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6153713 + ... + 6153878.

It is an arithmetic number, because the mean of its divisors is an integer number (258459432).

Almost surely, 2^1021530053 is an apocalyptic number.

It is an amenable number.

1021530053 is a deficient number, since it is larger than the sum of its proper divisors (12307675).

1021530053 is an equidigital number, since it uses as much as digits as its factorization.

1021530053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12307674.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 1021530053 is about 31961.3837779280. The cubic root of 1021530053 is about 1007.1257868863.

Adding to 1021530053 its reverse (3500351201), we get a palindrome (4521881254).

The spelling of 1021530053 in words is "one billion, twenty-one million, five hundred thirty thousand, fifty-three".